Keika Kunihiro 桂華邦裕

… Alternative Names

KEIKA Kunihiro 桂華邦裕

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Researcher Number	10719454
Other IDs
Affiliation (Current)	2025: 東京大学, 大学院理学系研究科(理学部), 助教
Affiliation (based on the past Project Information) *help	2016 – 2024: 東京大学, 大学院理学系研究科(理学部), 助教 2016: 東京大学, 理学(系)研究科(研究院), 助教 2015 – 2016: 名古屋大学, 宇宙地球環境研究所, 特任助教 2015: 名古屋大学, 学内共同利用施設等, 助教 2015: 名古屋大学, 宇宙地球環境研究所, 助教 2014: 名古屋大学, 太陽地球環境研究所, 助教 2014: 名古屋大学, 太陽地球環境研究所, 特任助教
Review Section/Research Field	Principal Investigator Space and upper atmospheric physics / Basic Section 17010:Space and planetary sciences-related Except Principal Investigator Space and upper atmospheric physics / Medium-sized Section 17:Earth and planetary science and related fields / Basic Section 17010:Space and planetary sciences-related
Keywords	Principal Investigator 磁気嵐 / 酸素イオン / リングカレント / 地球起源酸素イオン / 環状電流 / 内部磁気圏 / 内部磁気圏リングカレント / 磁気圏尾部ダイナミクス / イオン輸送、加速、加熱 / 地球大気起源酸素イオン … More / 磁気圏尾部高速流 / 電荷依存 / 選択的加速と輸送 / 磁場双極子化 / あらせ（ERG）衛星 / 多点観測 / あらせ衛星 / イオン輸送、加速 / 電離圏起源イオン / サブストーム / 重イオン選択的加速 / 地球磁気圏 / 酸素イオン加速 / Van Allen Probesミッション / 酸素イオン供給・加速 / 国際情報交換 / Van Allen Probes衛星 / データ解析ソフトウェア開発 / 酸素イオン加速と供給 / 地球内部磁気圏観測 / Outflow and transport / Acceleration and loss / ring current / geomagnetic storms / Inner magnetosphere … More Except Principal Investigator 内部磁気圏 / 磁気嵐 / イオン組成 / 固有磁場 / 惑星大気進化 / 酸素イオントーラス / 磁気圏尾部 / かぐや衛星 / 月周辺プラズマ環境 / 船外観測装置HERMES / 月周回有人拠点Gateway / 大気散逸 / ハビタブル惑星 / 宇宙環境 / 粒子加速 / プラズマ加熱 / 磁気圏衛星観測 / プラズマ粒子シミュレーション / 無衝突プラズマ / エネルギー分配 / 磁気リコネクション / 大気流出 / 惑星探査 / 火星 / 宇宙科学 / 宇宙空間プラズマ / 超高層物理学 / 長期地磁気脈動 / イオン加速 / 波動粒子相互作用 / ドリフトバウンス共鳴 / 長周期地磁気脈動 / サブストーム / リングカレント Less

Study of ion composition in the lunar plasma environment by using Gateway/HERMES
- Principal Investigator
  
  能勢正仁
- Project Period (FY)
  2022 – 2027
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
- Review Section
  
  Medium-sized Section 17:Earth and planetary science and related fields
- Research Institution
  Nagoya City University
  Nagoya University
Study on oxygen ion energization in the near-Earth magnetotail using multi-spacecraft observations and particle tracing simulationPrincipal Investigator
- Principal Investigator
  
  Keika Kunihiro
- Project Period (FY)
  2020 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 17010:Space and planetary sciences-related
- Research Institution
  The University of Tokyo
Study on effects of the intrinsic magnetic field strength on planetary atmospheres and space environments based on comparisons of terrestrial planets
- Principal Investigator
  
  Seki Kanako
- Project Period (FY)
  2020 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 17:Earth and planetary science and related fields
- Research Institution
  The University of Tokyo
Physics of energy partition between ion and electron during magnetic reconnection
- Principal Investigator
  
  Hoshino Masahiro
- Project Period (FY)
  2019 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 17010:Space and planetary sciences-related
- Research Institution
  The University of Tokyo
Study on spatio-temporal variations of oxygen ring current enhancements during magnetic storms using multi-spacecraft observationsPrincipal Investigator
- Principal Investigator
  
  Keika Kunihiro
- Project Period (FY)
  2017 – 2019
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Space and upper atmospheric physics
- Research Institution
  The University of Tokyo
Investigation of ion composition change in the inner magnetosphere based on multi-satellite observations and numerical simulations
- Principal Investigator
  
  Nose Masahito
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Space and upper atmospheric physics
- Research Institution
  Nagoya University
  Kyoto University
Effects of intrinsic magnetic fields on the planetary magnetosphere/ionosphere environment based on comparison of Mars and Earth
- Principal Investigator
  
  Seki Kanako
- Project Period (FY)
  2016 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Space and upper atmospheric physics
- Research Institution
  The University of Tokyo
Study on the acceleration and loss of ring current ions using multiple spacecraft in the inner magnetospherePrincipal Investigator
- Principal Investigator
  
  Keika Kunihiro
- Project Period (FY)
  2014 – 2017
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Space and upper atmospheric physics
- Research Institution
  The University of Tokyo
  Nagoya University
Investigation of creation and transport mechanisms of energetic ions in deep inner magnetosphere and their dependence on ion species
- Principal Investigator
  
  Nose Masahito
- Project Period (FY)
  2013 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Space and upper atmospheric physics
- Research Institution
  Kyoto University

All 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 Other

All Journal Article Presentation

[Journal Article] Characteristic E-Region Plasma Signature of Magnetospheric Wave-Particle Interactions2025
- Author(s)
  Magnus F. I. Y. Miyashita J.-P. St-Maurice G. C Hussey B. Pitzel D. Galeschuk S. Marei R. B. Horne Y. Kasahara S. Matsuda S. Kasahara K. Keika Y. Miyoshi K. Yamamoto A. Shinbori D. R. Huyghebaer A. Matsuoka S. Yokota F. Tsuchiya
- Journal Title
  
  Physical Review Letters
  
  Volume: 134 Issue: 14 Pages: 145201-145201
- DOI
  10.1103/physrevlett.134.145201
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22553, KAKENHI-PROJECT-22KK0045
[Journal Article] Detection of ultrafast electron energization by whistler-mode chorus waves in the magnetosphere of Earth2025
- Author(s)
  Kurita S.、Miyoshi Y.、Saito S.、Kasahara S.、Katoh Y.、Matsuda S.、Yokota S.、Kasahara Y.、Matsuoka A.、Hori T.、Keika K.、Teramoto M.、Shinohara I.
- Journal Title
  
  Scientific Reports
  
  Volume: 15 Issue: 1 Pages: 992-992
- DOI
  10.1038/s41598-024-80693-8
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22553, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-24K00687, KAKENHI-PROJECT-22K03699, KAKENHI-PROJECT-22K19845, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046
[Journal Article] Direct Evidence for Electron Pitch Angle Scattering Driven by Electrostatic Cyclotron Harmonic Waves2025
- Author(s)
  Kurita S.、Miyoshi Y.、Kasahara S.、Yokota S.、Kasahara Y.、Matsuda S.、Kumamoto A.、Tsuchiya F.、Matsuoka A.、Hori T.、Keika K.、Teramoto M.、Yamamoto K.、Shinohara I.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 52 Issue: 5 Pages: 1-9
- DOI
  10.1029/2024gl113188
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22553, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-22K03699, KAKENHI-PROJECT-22K19845, KAKENHI-PROJECT-22KK0045
[Journal Article] Statistical Survey of Loss Cone Electrons Observed In Situ in the Inner Magnetosphere2025
- Author(s)
  Takahara R.、Shinohara I.、Kasahara S.、Asamura K.、Yokota S.、Keika K.、Kazama Y.、Wang S.‐Y.、Tam S. W. Y.、Chang T.‐F.、Wang B.‐J.、Jun C.‐W.、Hori T.、Matsuoka A.、Teramoto M.、Yamamoto K.、Kasahara Y.、Matsuda S.、Kumamoto A.、Shinbori A.、Tsuchiya F.、Miyoshi Y.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 52 Issue: 3
- DOI
  10.1029/2024gl112948
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22553, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-24K00687, KAKENHI-PROJECT-22KK0045
[Journal Article] Magnetic storm-time red aurora as seen from Hokkaido, Japan on December 1, 2 2023 associated with high-density solar wind2024
- Author(s)
  Kataoka, R., Y. Miyoshi, K. Shiokawa, N. Nishitani, K. Keika, T. Amano, and K. Seki
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 51 Issue: 12
- DOI
  10.1029/2024gl108778
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-21H04518, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-23K22555, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046
[Journal Article] Global validation of data-assimilative electron ring current nowcast for space weather applications2024
- Author(s)
  Haas Bernhard、Shprits Yuri Y.、Wutzig Michael、Szabo-Roberts、 M. G. Penaranda、A. M. Castillo Tibocha、Himmelsbach Julia、Wang Dedong、Miyoshi Yoshizumi、Kasahara Satoshi、Keika Kunihiro、Yokota Shoichiro、Shinohara Iku、Hori Tomo
- Journal Title
  
  Scientific Reports
  
  Volume: 14 Issue: 1 Pages: 2327-2327
- DOI
  10.1038/s41598-024-52187-0
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H05429, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046
[Journal Article] Direct Evidence of Drift‐Compressional Wave Generation in the Earth's Magnetosphere Detected by Arase2024
- Author(s)
  Yamamoto K.、Rubtsov A. V.、Kostarev D. V.、Mager P. N.、Klimushkin D. Yu.、Nose M.、Matsuoka A.、Asamura K.、Miyoshi Y.、Yokota S.、Kasahara S.、Hori T.、Keika K.、Kasahara Y.、Kumamoto A.、Tsuchiya F.、Shoji M.、Nakamura S.、Shinohara I.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 51 Issue: 8 Pages: 1-11
- DOI
  10.1029/2023gl107707
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KJ0532, KAKENHI-PROJECT-20H00192, KAKENHI-PROJECT-21H01147, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-21H04518, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045
[Journal Article] On the factors controlling the relationship between type of pulsating aurora and energy of pulsating auroral electrons: Simultaneous observations by Arase satellite, ground-based all-sky imagers and EISCAT radar2024
- Author(s)
  Ito, Y., K. Hosokawa, Y. Ogawa, Y. Miyoshi, F. Tsuchiya, M. Fukizawa, Y. Kasaba, Y. Kazama, S. Oyama, K. Murase, S. Nakamura, et al.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 129 Issue: 7
- DOI
  10.1029/2024ja032617
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21H04518, KAKENHI-PROJECT-23K20876, KAKENHI-PROJECT-23K22553, KAKENHI-PROJECT-23K22554, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-24K00687, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-21KK0059, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046
[Journal Article] ELFIN‐GPS Comparison of Energetic Electron Fluxes: Modeling Low‐Altitude Electron Flux Mapping to the Equatorial Magnetosphere2024
- Author(s)
  Sun Weiqin、Zhang Xiao‐Jia、Artemyev Anton V.、Mourenas Didier、Morley Steven K.、Angelopoulos Vassilis、Kasahara S.、Miyoshi Y.、Matsuoka A.、Mitani T.、Yokota S.、Hori T.、Keika K.、Takashima T.、Teramoto M.、Shinohara I.、Yamamoto K.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 129 Issue: 11
- DOI
  10.1029/2024ja033155
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046
[Journal Article] Observation and Numerical Simulation of Cold Ions Energized by EMIC Waves2024
- Author(s)
  Kim, K.-H., C.-W. Jun, J.-W. Kwon, J. Lee, K. Shiokawa, Y. Miyoshi, E.-H. Kim, K. Min, J. Seough, K. Asamura, I. Shinohara, A. Matsuoka, S. Yokota, Y. Kasahara, S. Kasahara, K. Keika, A. Kumamoto, and F. Tsuchiya,
- Journal Title
  
  Journal of Geophysical Research
  
  Volume: 129 Issue: 5
- DOI
  10.1029/2023ja032361
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-21H04518, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-22KK0045
[Journal Article] 磁気圏に対する地球大気の影響力は想定以上？2024
- Author(s)
  桂華邦裕, 笠原慧
- Journal Title
  
  東京大学大学院理学系研究科・理学部ニュース
  
  Volume: 55 Pages: 11-11
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22KK0045
[Journal Article] 磁気圏に対する地球大気の影響力は想定以上？2024
- Author(s)
  桂華邦裕, 笠原慧
- Journal Title
  
  東京大学大学院理学系研究科・理学部ニュース
  
  Volume: 55 Pages: 11-11
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-20H01957
[Journal Article] Terrestrial-origin O+ ions below 1 keV near the Moon measured with the Kaguya satellite2024
- Author(s)
  Yamauchi, D., M. Nose, Y. Harada, K. Yamamoto, K. Keika, A. Nagamatsu, S. Yokota, Y. Saito, and A. Glocer
- Journal Title
  
  Earth, Planets and Space
  
  Volume: 76 Issue: 1
- DOI
  10.1186/s40623-024-02107-3
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21H04518, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045
[Journal Article] Global distribution of EMIC waves and its association to subauroral proton precipitation during the 27 May 2017 storm: Modeling and multipoint observations2024
- Author(s)
  Shreedevi P. R., Y. Yu, Y. Miyoshi, X. Tian, M. Zhu, V. K. Jordanova, S. Nakamura, C.-W. Jun, S. Kumar, K. Shiokawa, M. Connors, et al.
- Journal Title
  
  Journal of Geophysical Research
  
  Volume: 129 Issue: 6
- DOI
  10.1029/2023ja032337
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21H04518, KAKENHI-PROJECT-22KF0167, KAKENHI-PROJECT-22KF0169, KAKENHI-PROJECT-23K25925, KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046
[Journal Article] The variable source of the plasma sheet during a geomagnetic storm2023
- Author(s)
  Kistler, L. M., K. Asamura, S. Kasahara, Y. Miyoshi, C. G. Mouikis, K. Keika, S. M. Petrinec, M. L. Stevens, T. Hori, S. Yokota, and I. Shinohara
- Journal Title
  
  Nature Communications
  
  Volume: 14 Issue: 1 Pages: 1-9
- DOI
  10.1038/s41467-023-41735-3
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K21345, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-22KK0046, KAKENHI-PROJECT-21H04526, KAKENHI-PROJECT-20H01959, KAKENHI-PROJECT-21H04509, KAKENHI-PROJECT-23H05429, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-23K25925
[Journal Article] Direct Observations of Energetic Electron Scattering and Precipitation Due To Whistler‐Mode Waves in the Dayside High‐Density Regions2023
- Author(s)
  Sugo Shin、Kasahara Satoshi、Miyoshi Yoshizumi、Katoh Yuto、Keika Kunihiro、Yokota Shoichiro、Hori Tomoaki、Kasahara Yoshiya、Matsuda Shoya、Matsuoka Ayako、Shinohara Iku、Tsuchiya Fuminori、Kumamoto Atsushi、Nakamura Satoko、Kitahara Masahiro
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 128 Issue: 3 Pages: 1-12
- DOI
  10.1029/2022ja030992
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21K13978, KAKENHI-PROJECT-20K14546, KAKENHI-PROJECT-20H00192, KAKENHI-PROJECT-20H01955, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-20H01959, KAKENHI-PROJECT-21H01146
[Journal Article] Global Characteristics of Cold Protons Around Midnight in the Magnetotail: Implication for Efficient Heating and Origin2022
- Author(s)
  Keika K.、Asami R.、Hoshino M.、Fuselier S. A.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 127 Issue: 7 Pages: 1-15
- DOI
  10.1029/2021ja029576
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K20908, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-19H01949, KAKENHI-PROJECT-20H00192, KAKENHI-PROJECT-20H01957
[Journal Article] Preferential Energization of Lower‐Charge‐State Heavier Ions in the Near‐Earth Magnetotail2022
- Author(s)
  Keika K.、Kasahara S.、Yokota S.、Hoshino M.、Seki K.、Amano T.、Kistler L. M.、Nos? M.、Miyoshi Y.、Hori T.、Shinohara I.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 127 Issue: 1 Pages: 1-20
- DOI
  10.1029/2021ja029786
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H02966, KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-21H01147, KAKENHI-PROJECT-20H00192, KAKENHI-PROJECT-19H01949, KAKENHI-PROJECT-20H01957
[Journal Article] Signatures of Auroral Potential Structure Extending Through the Near‐Equatorial Inner Magnetosphere2022
- Author(s)
  Imajo S.、Miyoshi Y.、Asamura K.、Shinohara I.、Nos? M.、Shiokawa K.、Kasahara Y.、Kasaba Y.、Matsuoka A.、Kasahara S.、Yokota S.、Keika K.、Hori T.、Shoji M.、Nakamura S.、Teramoto M.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 49 Issue: 10 Pages: 1-10
- DOI
  10.1029/2022gl098105
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-21K13977, KAKENHI-PROJECT-21K13978, KAKENHI-PROJECT-22KK0045, KAKENHI-PROJECT-21H01147, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-16H06286, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-21H01146
[Journal Article] Low-altitude ion upflow observed by EISCAT and its effects on supply of molecular ions in the ring current detected by Arase (ERG)2021
- Author(s)
  Takada, M., Seki, K., Ogawa, Y., Keika, K., Kasahara, S., Yokota, S., et al.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 126 Issue: 5
- DOI
  10.1029/2020ja028951
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-20H00192, KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-20KK0313, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-16H06286, KAKENHI-PROJECT-21H04520
[Journal Article] Data‐Driven Simulation of Rapid Flux Enhancement of Energetic Electrons With an Upper‐Band Whistler Burst2021
- Author(s)
  Saito S., Kurita S., Miyoshi Y., Kasahara S., Yokota S., Keika K., Hori T., Kasahara Y., Matsuda S., Shoji M., Nakamura S., Matsuoka A., Imajo S., Shinohara I.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 126 Issue: 4
- DOI
  10.1029/2020ja028979
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14546, KAKENHI-PUBLICLY-18H04441, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-15H05747, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-20H01959
[Journal Article] Magnetic Field and Energetic Particle Flux Oscillations and High‐Frequency Waves Deep in the Inner Magnetosphere During Substorm Dipolarization: ERG Observations2021
- Author(s)
  Miyashita Yukinaga、Chang Tzu‐Fang、Miyoshi Yoshizumi、Hori Tomoaki、Kadokura Akira、Kasahara Satoshi et al.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 126 Issue: 9
- DOI
  10.1029/2020ja029095
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-21H01146
[Journal Article] Contribution of Electron Pressure to Ring Current and Ground Magnetic Depression Using RAM‐SCB Simulations and Arase Observations During 7?8 November 2017 Magnetic Storm2021
- Author(s)
  Kumar S.、Miyoshi Y.、Jordanova V. K.、Engel M.、Asamura K.、Yokota S.、Kasahara S.、Kazama Y.、Wang S.‐Y.、Mitani T.、Keika K.、Hori T.、Jun C.、Shinohara I.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 126 Issue: 6
- DOI
  10.1029/2021ja029109
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-16H06286, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-21H01146
[Journal Article] Relative Contribution of ULF Waves and Whistler‐Mode Chorus to the Radiation Belt Variation During the May 2017 Storm2021
- Author(s)
  Takahashi Naoko、Seki Kanako、Fok Mei‐Ching、Zheng Yihua、Miyoshi Yoshizumi、Kasahara Satoshi、Keika Kunihiro、Hartley David、Kasahara Yoshiya、Kasaba Yasumasa、Higashio Nana、Matsuoka Ayako、Yokota Shoichiro、Hori Tomoaki、Shoji Masafumi、Nakamura Satoko、Imajo Shun、Shinohara Iku
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 126 Issue: 11
- DOI
  10.1029/2020ja028972
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-16H06286, KAKENHI-PROJECT-20H01959, KAKENHI-PROJECT-20H00192, KAKENHI-PROJECT-21H01146
[Journal Article] Evening Side EMIC Waves and Related Proton Precipitation Induced by a Substorm2021
- Author(s)
  Yahnin A. G.、Popova T. A.、Demekhov A. G.、Lubchich A. A.、Matsuoka A.、Asamura K.、Miyoshi Y.、Yokota S.、Kasahara S.、Keika K.、Hori T.、Tsuchiya F.、Kumamoto A.、Kasahara Y.、Shoji M.、Kasaba Y.、Nakamura S.、Shinohara I.、Kim H.、Noh S.、Raita T.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 126 Issue: 7
- DOI
  10.1029/2020ja029091
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-20K04039, KAKENHI-PROJECT-21K13978, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-16H06286, KAKENHI-PROJECT-20H01957, KAKENHI-PROJECT-21H01146
[Journal Article] On the relationship between energy input to the ionosphere and the ion outflow flux under different solar zenith angles2021
- Author(s)
  Kitamura Naritoshi、Seki Kanako、Keika Kunihiro、Nishimura Yukitoshi、Hori Tomoaki、Hirahara Masafumi、Lund Eric J.、Kistler Lynn M.、Strangeway Robert J.
- Journal Title
  
  Earth, Planets and Space
  
  Volume: 73 Issue: 1
- DOI
  10.1186/s40623-021-01532-y
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14781, KAKENHI-PROJECT-18KK0099, KAKENHI-PROJECT-20H00192
[Journal Article] Proton-Oxygen Differences in Energization During Dipolarization in Saturn's Magnetotail: A Case Study of Cassini Observations2020
- Author(s)
  K. Keika, P. C. Brandt, D. G. Mitchell, R. C. Allen, C. Paranicas, M. Kusterer, D. C. Hamilton, and S. Sakai
- Journal Title
  
  Proceedings of Symposium on Planetary Science 2020
  
  Volume: - Pages: 1-4
- Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Journal Article] Comprehensive Observations of Substorm‐Enhanced Plasmaspheric Hiss Generation, Propagation, and Dissipation2020
- Author(s)
  Liu Nigang、Su Zhenpeng、Gao Zhonglei、Zheng Huinan、Wang Yuming、Wang Shui、Miyoshi Yoshizumi、Shinohara Iku、et al.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 47 Issue: 2
- DOI
  10.1029/2019gl086040
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-19K03949, KAKENHI-PUBLICLY-18H04441, KAKENHI-PROJECT-18H03727
[Journal Article] Statistical study on electron and ion temperatures in the near-Earth reconnection and magnetic pile-up regions2019
- Author(s)
  K. Watanabe, K. Keika, M. Hoshino, N. Kitamura, Y. Saito, B. L. Giles, and W. R. Paterson
- Journal Title
  
  Geophys. Res. Letters
  
  Volume: 46 Issue: 24 Pages: 14223-14229
- DOI
  10.1029/2019gl084837
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01949, KAKENHI-PROJECT-17K14400
[Journal Article] Statistical study of selective oxygen increase in high‐energy ring current ions during magnetic storms2019
- Author(s)
  Mitani, K., K. Seki, K. Keika, M. Gkioulidou, L. J. Lanzerotti, D. G. Mitchell, C. A. Kletzing, A. Yoshikawa, and Y. Obana
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 124 Issue: 5 Pages: 3193-3209
- DOI
  10.1029/2018ja026168
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H06286
[Journal Article] Cusp and Nightside Auroral Sources of O + in the Plasma Sheet2019
- Author(s)
  Kistler L. M.、Mouikis C. G.、Asamura K.、Yokota S.、Kasahara S.、Miyoshi Y.、Keika K.、Matsuoka A.、Shinohara I.、Hori T.、Kitamura N.、Petrinec S. M.、Cohen I. J.、Delcourt D. C.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 124 Issue: 12 Pages: 10036-10047
- DOI
  10.1029/2019ja027061
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-18KK0099, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-18H03727
[Journal Article] Meridional Distribution of Middle‐Energy Protons and Pressure‐Driven Currents in the Nightside Inner Magnetosphere: Arase Observations2019
- Author(s)
  Imajo S.、Nos? M.、Kasahara S.、Yokota S.、Matsuoka A.、Keika K.、Hori T.、Teramoto M.、Yamamoto K.、Oimatsu S.、Nomura R.、Fujimoto A.、Shinohara I.、Miyoshi Y.
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 124 Issue: 7 Pages: 5719-5733
- DOI
  10.1029/2019ja026682
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-18KK0099, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17J00472, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H06286, KAKENHI-PROJECT-18H03727
[Journal Article] Eastward propagating second harmonic poloidal waves triggered by temporary outward gradient of proton phase space density: Van Allen Probe A observation2019
- Author(s)
  Yamamoto, K., M. Nose, K. Keika, D. P. Hartley, C. W. Smith, R. J. MacDowall, L. J. Lanzerotti, D. G. Mitchell, H. E. Spence, G. D. Reeves, J. R. Wygant, J. W. Bonnell, and S. Oimatsu
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 124 Issue: 12 Pages: 1-20
- DOI
  10.1029/2019ja027158
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-19J14222, KAKENHI-PROJECT-19J14368, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H06286
[Journal Article] Characteristics of CME‐ and CIR‐driven ion upflows in the polar ionosphere2019
- Author(s)
  Y. Ogawa K. Seki K. Keika Y. Ebihara
- Journal Title
  
  Journal of Geophysical Research: Space Physics
  
  Volume: 124 Issue: 5 Pages: 3637-3649
- DOI
  10.1029/2018ja025870
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15H03732, KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-17K14400
[Journal Article] EMIC waves converted from equatorial noise due to M/Q=2 ions in the plasmasphere: Observations from Van Allen Probes and Arase2019
- Author(s)
  Miyoshi Y.、Matsuda S.、Kurita S.、Nomura K.、Keika K.、Shoji M.、Kitamura N.、Kasahara Y.、Matsuoka A.、Shinohara I.、Shiokawa K.、Machida S.、Santolik O.、Boardsen S.A.、Horne R.B.、Wygant J.F.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 29 April Issue: 11 Pages: 0-0
- DOI
  10.1029/2019gl083024
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-INTERNATIONAL-15K21709, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H06286, KAKENHI-PUBLICLY-18H04441
[Journal Article] Statistical Properties of Molecular Ions in the Ring Current Observed by the Arase (ERG) Satellite2019
- Author(s)
  Seki K.、Keika K.、Kasahara S.、Yokota S.、Hori T.、Asamura K.、Higashio N.、Takada M.、Ogawa Y.、Matsuoka A.、Teramoto M.、Miyoshi Y.、Shinohara I.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 46 Issue: 15 Pages: 8643-8651
- DOI
  10.1029/2019gl084163
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-18KK0099, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-18H03727
[Journal Article] Strong Diffusion of Energetic Electrons by Equatorial Chorus Waves in the Midnight‐to‐Dawn Sector2019
- Author(s)
  Kasahara S.、Miyoshi Y.、Kurita S.、Yokota S.、Keika K.、Hori T.、Kasahara Y.、Matsuda S.、Kumamoto A.、Matsuoka A.、Seki K.、Shinohara I.
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 46 Issue: 22 Pages: 12685-12692
- DOI
  10.1029/2019gl085499
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03949, KAKENHI-PROJECT-18KK0099, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-17K14400, KAKENHI-PUBLICLY-18H04441, KAKENHI-PROJECT-18H03727
[Journal Article] Theory, modeling, and integrated studies in the Arase (ERG) project2018
- Author(s)
  Seki Kanako、Miyoshi Yoshizumi、Ebihara Yusuke、Katoh Yuto、Amano Takanobu、Saito Shinji、Shoji Masafumi、Nakamizo Aoi、Keika Kunihiro、Hori Tomoaki、Nakano Shin’ya、Watanabe Shigeto、Kamiya Kei、Takahashi Naoko、Omura Yoshiharu、Nose Masahito、Fok Mei-Ching、Tanaka Takashi、Ieda Akimasa、Yoshikawa Akimasa
- Journal Title
  
  Earth, Planets and Space
  
  Volume: 70 Issue: 1 Pages: 17-17
- DOI
  10.1186/s40623-018-0785-9
- NAID
  120006517789
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-16H01170, KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-15H03730, KAKENHI-PROJECT-15H03732, KAKENHI-PROJECT-17H01704, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17H02966
[Journal Article] Van Allen Probes observations of drift-bounce resonance and energy transfer between energetic ring current protons and poloidal Pc4 wave2018
- Author(s)
  Oimatsu, S., M. Nose, K. Takahashi, K. Yamamoto, K. Keika, C. A. Kletzing, C. W. Smith, R. J. MacDowall, and D. G. Mitchell
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 123 Issue: 5 Pages: 1-15
- DOI
  10.1029/2017ja025087
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-16H06286
[Journal Article] Ion energies dominating energy density in the inner magnetosphere: Spatial distributions and composition, observed by Arase/MEP-i2018
- Author(s)
  Keika, K. S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose, T. Amano, Y. Miyoshi, and I. Shinohara,
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 45 Issue: 22 Pages: 12153-12162
- DOI
  10.1029/2018gl080047
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-15H05747, KAKENHI-PROJECT-17H01175, KAKENHI-PROJECT-17H02966
[Journal Article] Magnetic field dipolarization and its associated ion flux variations in the dawnside deep inner magnetosphere: Arase observations2018
- Author(s)
  Nose, M., A. Matsuoka, S. Kasahara, S. Yokota, M. Teramoto, K. Keika, K. Yamamoto, R. Nomura, A. Fujimoto, N. Higashio, H. Koshiishi, S. Imajo, S. Oimatsu, Y.‐M. Tanaka, M. Shinohara, I. Shinohara, and Y. Miyoshi
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 45 Issue: 16 Pages: 7942-7950
- DOI
  10.1029/2018gl078825
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17H01175
[Journal Article] Pulsating aurora from electron scattering by chorus waves2018
- Author(s)
  S. Kasahara, Y. Miyoshi, S. Yokota, T. Mitani, Y. Kasahara, S. Matsuda, A. Kumamoto, A. Matsuoka, Y. Kazama, H. U. Frey, V. Angelopoulos, S. Kurita, K. Keika, K. Seki & I. Shinohara
- Journal Title
  
  Nature
  
  Volume: 554 Issue: 7692 Pages: 337-340
- DOI
  10.1038/nature25505
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PUBLICLY-16H01172, KAKENHI-PROJECT-16H04056, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-17H02970, KAKENHI-PROJECT-16J02163, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-15H05747, KAKENHI-PROJECT-17H06140
[Journal Article] Giant pulsations excited by a steep earthward gradient of proton phase space density: Arase observation2018
- Author(s)
  Yamamoto, K., M. Nose, S. Kasahara, S. Yokota, K. Keika, A. Matsuoka, M. Teramoto, K. Takahashi, S. Oimatsu, R. Nomura, M. Vellante, B. Heilig, A. Fujimoto, Y. Tanaka, M. Shinohara I. Shinohara, and Y. Miyoshi
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 45 Issue: 14 Pages: 6773-6781
- DOI
  10.1029/2018gl078293
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-26400478, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17H01175
[Journal Article] Magnetosphere-ionosphere connection of storm-time Region-2 field-aligned current and ring current: Arase and AMPERE observations2018
- Author(s)
  Imajo, S., M. Nose, A. Matsuoka, S. Kasahara, S. Yokota, M. Teramoto, K. Keika, T. Motoba, B. Anderson, R. Nomura, A. Fujimoto, I. Shinohara, and Y. Miyoshi
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 123 Pages: 1-15
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Journal Article] Three-step buildup of the 17 March 2015 storm ring current: Implication for the cause of the unexpected storm intensification2018
- Author(s)
  Keika,K. K. Seki, M. Nos_, Y. Miyoshi, L. Lanzerotti, D. Mitchell, M. Gkioulidou, and J. Manweiler
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 123 Issue: 1 Pages: 1-15
- DOI
  10.1002/2017ja024462
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-26800257, KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815
[Journal Article] Magnetosphere-ionosphere connection of storm-time Region-2 field-aligned current and ring current: Arase and AMPERE observations2018
- Author(s)
  S. Imajo, M. Nose, A. Matsuoka, S. Kasahara, S. Yokota, M. Teramoto, K. Keika, T. Motoba, B. Anderson, R. Nomura, A. Fujimoto, I. Shinohara, and Y. Miyoshi
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 123 Issue: 11 Pages: 9545-9559
- DOI
  10.1029/2018ja025865
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-17J00472, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17H01175
[Journal Article] Radial transport of higher-energy oxygen ions into the deep inner magnetosphere observed by Van Allen Probes2018
- Author(s)
  K. Mitani, K. Seki, K. Keika, M. Gkioulidou, L. J. Lanzerotti, D. G. Mitchell, and C. A. Kletzing
- Journal Title
  
  Geophys. Res. Lett.
  
  Volume: 45 Issue: 10 Pages: 4534-4541
- DOI
  10.1029/2018gl077500
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H02229, KAKENHI-PROJECT-16H06286
[Journal Article] Drift‐bounce resonance between Pc5 pulsations and ions at multiple energies in the nightside magnetosphere: Arase and MMS observations2018
- Author(s)
  Oimatsu, S., M. Nose, M. Teramoto, K. Yamamoto, A. Matsuoka, S. Kasahara, S. Yokota, K. Keika, G. Le, R. Nomura, A. Fujimoto, D. Sormakov, O. Troshichev, Y.‐M. Tanaka, M. Shinohara, I. Shinohara, Y. Miyoshi, J. A. Slavin, R. E. Ergun, and P.‐A. Lindqvist
- Journal Title
  
  Geophysical Research Letters
  
  Volume: 45 Issue: 15 Pages: 1-10
- DOI
  10.1029/2018gl078961
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K18804, KAKENHI-PROJECT-17K14400, KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-16H06286, KAKENHI-PLANNED-15H05815, KAKENHI-PROJECT-17H01175
[Journal Article] Storm time impulsive enhancements of energetic oxygen due to adiabatic acceleration of preexisting warm oxygen in the inner magnetosphere2016
- Author(s)
  Kunihiro Keika, Kanako Seki, Masahito Nose, Shinobu Machida, Yoshizumi Miyoshi, Louis J. Lanzerotti, Donald G. Mitchell, Matina Gkioulidou, Drew Turner, Harlan Spence, and Brian A. Larsen
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 121 Issue: 8 Pages: 7740-7752
- DOI
  10.1002/2016ja022384
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-26800257, KAKENHI-PROJECT-26247082
[Journal Article] ELF/VLF propagation at subauroral latitudes: Conjugate observation between the ground and Van Allen Probes A2016
- Author(s)
  Martinez-Calderon, C., K. Shiokawa , Y. Miyoshi , K. Keika , M. Ozaki , I. Schofield , M. Connors , C. Kletzing , M. Hanzelka , O. Santolik , and W. Kurth
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 121 Issue: 6 Pages: 1-10
- DOI
  10.1002/2015ja022264
- Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25247080, KAKENHI-PROJECT-26800257, KAKENHI-PROJECT-16H06286
[Journal Article] Van Allen Probes observations of magnetic field dipolarization and its associated O+ flux variations in the inner magnetosphere at L<6.62016
- Author(s)
  Nose, M., K. Keika, C. A. Kletzing, H. E. Spence, C. W. Smith, R. J. MacDowall, G. D. Reeves, B. A. Larsen, and D. G. Mitchell
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 121 Issue: 8 Pages: 1-18
- DOI
  10.1002/2016ja022549
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057, KAKENHI-PROJECT-26800257
[Journal Article] What caused the rapid recovery of the Carrington storm?2015
- Author(s)
  K. Keika, R. Kataoka, and Y. Ebihara
- Journal Title
  
  Earth, Planets and Space
  
  Volume: 67 Issue: 1 Pages: 1-12
- DOI
  10.1186/s40623-015-0234-y
- NAID
  120005758188
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-26800257, KAKENHI-PROJECT-25287127
[Journal Article] Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations2015
- Author(s)
  M. Nose, S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, and B. A. Larsen
- Journal Title
  
  Journal of Geophysical Research
  
  Volume: 120 Issue: 2 Pages: 1182-1196
- DOI
  10.1002/2014ja020593
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24740334, KAKENHI-PROJECT-26800257, KAKENHI-PROJECT-25287127
[Journal Article] Pileup accident hypothesis of magnetic storm on 2015 March 172015
- Author(s)
  Kataoka, R.; Shiota, D; Kilpua, E.; Keika, K.
- Journal Title
  
  Geophysical Research Lettes
  
  Volume: 42 Issue: 13 Pages: 5155-5161
- DOI
  10.1002/2015gl064816
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800255, KAKENHI-PROJECT-26800257, KAKENHI-PROJECT-15H02628
[Journal Article] CDF data archive and integrated data analysis platform for ERG-related ground data developed by ERG Science Center (ERG-SC)2015
- Author(s)
  T. Hori, Y. Miyashita, Y. Miyoshi, K. Seki, T. Segawa, Y.-M. Tanaka, K. Keika, M. Shoji, I. Shinohara, K. Shiokawa, Y. Otsuka, S. Abe, A. Yoshikawa, K. Yumoto, Y. Obana, N. Nishitani, A. S. Yukimatu, T. Nagatsuma, M. Kunitake, K. Hosokawa, Y. Ogawa, K. T. Murata, M. Nose', H. Kawano, and T. Sakanoi
- Journal Title
  
  J. Sp. Sci. Info. Jpn.
  
  Volume: 4 Pages: 75-89
- NAID
  110009894246
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-26800257
[Journal Article] An extensive survey of dayside diffuse aurora based on optical observations at Yellow River Station2015
- Author(s)
  Han, X.-C. Chen , J.-J. Liu, Q. Qiu, K. Keika, Z .-J. Hu, J.-M. Liu, H.-Q. Hu, and H. -G. Yang
- Journal Title
  
  Journal of Geophysical Research. Space Physics
  
  Volume: 120 Issue: 9 Pages: 1-19
- DOI
  10.1002/2015ja021699
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Journal Article] Initial Measurements of O-ion and He-ion Decay Rates Observed from the Van Allen Probes RBSPICE Instrument2014
- Author(s)
  Gerrard, A., L. J. Lanzerotti, M. Gkioulidou, D. G. Mitchell, J. Manweiler, J. Bortnik, and K. Keika
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 119 Issue: 11 Pages: 8813-8819
- DOI
  10.1002/2014ja020374
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-25287127, KAKENHI-PROJECT-26800257
[Journal Article] Observational Technique of the Solar System Plasma: Remote Sensing of Planetary Plasma and Atmosphere2014
- Author(s)
  I. Yoshikawa, K. Yoshioka, K. Keika, and Y. Ezoe
- Journal Title
  
  Journal of Plasma and Fusion Research
  
  Volume: 90 Pages: 786-788
- Open Access
- Data Source
  KAKENHI-PROJECT-26800257
[Journal Article] Magnetic fluctuations embedded in dipolarization inside geosynchronous orbit and their associated selective acceleration of O+ ions2014
- Author(s)
  Nose, M., K. Takahashi, K. Keika, L. M. Kistler, K. Koga, H. Koshiishi, H. Matsumoto, M. Shoji, Y. Miyashita, and R. Nomura
- Journal Title
  
  J. Geophys. Res.
  
  Volume: 119 Issue: 6 Pages: 1-17
- DOI
  10.1002/2014ja019806
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25287127, KAKENHI-PROJECT-26800256, KAKENHI-PROJECT-26247082
[Presentation] Direct Evidence of Drift-Compressional Wave Generation in the Earth's Magnetosphere Detected by Arase2024
- Author(s)
  K. Yamamoto, A. V. Rubtsov, D. V. Kostarev, P. N. Mager, D. Yu. Klimushkin, M. Nose, A. Matsuoka, K. Asamura, Y. Miyoshi, S. Yokota, S. Kasahara, T. Hori, K. Keika, Y. Kasahara, A. Kumamoto, F. Tsuchiya, and I. Shinohara
- Organizer
  2024 AGU Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Energy-spectral evolution of ring current ions of ionospheric origin during intense magnetic storms2024
- Author(s)
  Kunihiro Keika, Kanako Seki, Satoshi Kasahara, Shoichiro Yokota, Tomoaki Hori, Yoshizumi Miyoshi, Iku Shinohara, and Ayako Matsuoka
- Organizer
  地球電磁気・地球惑星圏学会2024年秋季年会
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Energy-spectral evolution of ring current ions of ionospheric origin during intense magnetic storms2024
- Author(s)
  Kunihiro Keika, Kanako Seki, Satoshi Kasahara, Shoichiro Yokota, Tomoaki Hori, Yoshizumi Miyoshi, Iku Shinohara, and Ayako Matsuoka
- Organizer
  2024 AGU Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Terrestrial-origin O+ ions below 1 keV near the Moon measured with the KAGUYA satellite2023
- Author(s)
  Yamauchi, D., M. Nose, Y. Harada, K. Keika, K. Yamamoto, A. Nagamatsu, S. Yokota, and Y. Saito
- Organizer
  第154回地球電磁気・地球惑星圏学会総会
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] O+ ions of terrestrial origin near the Moon measured with the Kaguya satellite2023
- Author(s)
  Yamauchi, D., M. Nose, Y. Harada, K. Keika, K. Yamamoto, A. Nagamatsu, S. Yokota, and Y. Saito
- Organizer
  日本地球惑星科学連合2023年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Characteristics of plasma transport and energization in the inner magnetosphere: Long-term observations by Arase/MEP-i2023
- Author(s)
  K. Keika
- Organizer
  URSI GASS 2023 Meeting, Sapporo Convention Center Sapporo Business Innovation Center
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] O+ ions of terrestrial origin near the Moon measured with the Kaguya satellite2023
- Author(s)
  Yamauchi, D., M. Nose, Y. Harada, K. Keika, K. Yamamoto, A. Nagamatsu, S. Yokota, and Y. Saito
- Organizer
  AGU23 (San Francisco)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Characteristics of energetic ions contributing to the storm-time ring current: Long-term observations by Arase/MEP-i2023
- Author(s)
  桂華邦裕
- Organizer
  第154回地球電磁気・地球惑星圏学会講演会
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] IMAGE ENA imaging: Charge-exchange interactions between Earth’s exosphere (Geocorona) and magnetospheric >10 keV ions in the inner magnetosphere2023
- Author(s)
  K. Keika
- Organizer
  ISSI Meeting on “The Earth’s Exosphere and Its Response to Space Weather”
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Characteristics of plasma transport and energization in the inner magnetosphere: Long-term observations by Arase/MEP-i2023
- Author(s)
  桂華邦裕
- Organizer
  URSI GASS 2023 Meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Characteristics of Energetic Ions Contributing to the Storm-time Ring Current: Long-term Arase/MEP-i Observations2023
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  American Geophysical Union 2023 Fall Meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] IMAGE ENA imaging: Charge-exchange interactions between Earth’s exosphere (Geocorona) and magnetospheric >10 keV ions in the inner magnetosphere2023
- Author(s)
  K. Keika
- Organizer
  ISSI Meeting on “The Earth’s Exosphere and Its Response to Space Weather”
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Characteristics of Energetic Ions Contributing to the Storm-time Ring Current: Long-term Arase/MEP-i Observations2023
- Author(s)
  桂華邦裕
- Organizer
  AGU Fall Meeting 2023
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Characteristics of energetic ions contributing to the storm-time ring current: Long-term observations by Arase/MEP-i2023
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  SGEPSS 2023 Fall Meeting, Tohoku University
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Characteristics of plasma supply and energization in the inner magnetosphere: Arase long-term observations2023
- Author(s)
  桂華邦裕
- Organizer
  日本地球惑星科学連合2023年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Characteristics of Energetic Ions Contributing to the Storm-time Ring Current: Long-term Arase/MEP-i Observations2023
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  American Geophysical Union 2023 Fall Meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] IMAGE ENA imaging: Charge-exchange interactions between Earth’s exosphere (Geocorona) and magnetospheric >10 keV ions in the inner magnetosphere2023
- Author(s)
  桂華邦裕
- Organizer
  ISSI Meeting on “The Earth’s Exosphere and Its Response to Space Weather”
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Characteristics of plasma supply and energization in the inner magnetosphere: Arase long-term observations2023
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  JpGU 2023 Meeting, Makuhari Messe
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] O+ ions of terrestrial origin near the Moon measured with the Kaguya satellite2023
- Author(s)
  Yamauchi, D., M. Nose, Y. Harada, K. Keika, K. Yamamoto, A. Nagamatsu, S. Yokota, and Y. Saito
- Organizer
  19th European Space Weather Week
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Characteristics of plasma transport and energization in the inner magnetosphere: Long-term observations by Arase/MEP-i2023
- Author(s)
  K. Keika
- Organizer
  URSI GASS 2023 Meeting, Sapporo Convention Center Sapporo Business Innovation Center
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Characteristics of plasma supply and energization in the inner magnetosphere: Arase long-term observations2023
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  JpGU 2023 Meeting, Makuhari Messe
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Characteristics of energetic ions contributing to the storm-time ring current: Long-term observations by Arase/MEP-i2023
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  SGEPSS 2023 Fall Meeting, Tohoku University
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Characteristics of oxygen ion supply and energization in the inner magnetosphere during magnetic storms: Arase observations2022
- Author(s)
  桂華邦裕
- Organizer
  日本地球惑星科学連合2022年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Characteristics of oxygen ion supply and energization in the inner magnetosphere during magnetic storms: Arase observations2022
- Author(s)
  K. Keika, K. Seki, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, A. Matsuoka
- Organizer
  Japan Geoscience Union (JpGU) Meeting 2022
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Characteristics of oxygen ion supply and energization in the inner magnetosphere during magnetic storms: Arase observations2022
- Author(s)
  K. Keika, R. Miyamoto, S. Kasahara, S. Yokota, T. Hori, Y. Miyoshi, I. Shinohara, and A. Matsuoka
- Organizer
  JpGU Meeting 2022
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22KK0045
[Presentation] Global Characteristics of Cold Protons Around Midnight in the Magnetotail: MMS/HPCA observations2022
- Author(s)
  桂華邦裕
- Organizer
  第152回地球電磁気・地球惑星圏学会講演会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Global Characteristics of Cold Protons Around Midnight in the Magnetotail: MMS/HPCA observations2022
- Author(s)
  Keika, K., Asami, R., Hoshino, M., and Fuselier, S. A.
- Organizer
  第152回地球電磁気・地球惑星圏学会総会および講演会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] On Plasma Transport and Energization in the Magnetospheres of Magnetized Planets2021
- Author(s)
  K. Keika
- Organizer
  Symposium on Planetary Sciences
- Invited
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Observational study on preferential energization of lower-charge-state heavier ions in the near-Earth magnetotail2021
- Author(s)
  桂華邦裕
- Organizer
  AGU Fall Meeting 2021
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Reporter Review: Earth’s Ring Current2021
- Author(s)
  桂華邦裕
- Organizer
  Joint Scientific Assembly IAGA-IASPEI 2021
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Observational study on preferential energization of lower-charge-state heavier ions in the near-Earth magnetotail2021
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nosテゥ, Y. Miyoshi, T. Hori, and I. Shinohara
- Organizer
  American Geophysical Union 2021 Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Sources, Transport, and Energization of Magnetospheric Plasma2021
- Author(s)
  桂華邦裕
- Organizer
  JAXA/ISAS Planetary Exploration Workshop 2021?A
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] On Plasma Transport and Energization in the Magnetospheres of Magnetized Planets2021
- Author(s)
  桂華邦裕
- Organizer
  第22回惑星圏研究会
- Invited
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Reporter Review: Earth's Ring Current2021
- Author(s)
  K. Keika
- Organizer
  Joint Scientific Assembly IAGA-IASPEI 2021
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Preferential energization of lower-charge-state heavier ions in the near-Earth magnetotail2021
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nosテゥ, Y. Miyoshi, T. Hori, and I. Shinohara
- Organizer
  SGEPSS 2021 Fall Meeting
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Preferential energization of lower-charge-state heavier ions in the near-Earth magnetotail2021
- Author(s)
  桂華邦裕
- Organizer
  地球電磁気・地球惑星圏学会第150回講演会
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Sources, Transport, and Energization of Magnetospheric Plasma2021
- Author(s)
  K. Keika
- Organizer
  JAXA/ISAS Planetary Exploration Workshop 2021
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Observational study on preferential energization of low-charge-state heavy ions in the near-Earth magnetotail2020
- Author(s)
  桂華邦裕
- Organizer
  第148回地球電磁気・地球惑星圏学会秋季講演会
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Ion Energization During Reconnection-driven Large-scale Injections in Saturn's Magnetotail: Cassini Observations2020
- Author(s)
  K. Keika, P. C. Brandt, D. G. Mitchell, R. C. Allen, C. Paranicas, M. Kusterer, D. C. Hamilton, and S. Sakai
- Organizer
  Symposium on Planetary Sciences 2020
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Observational study on mass and charge dependence of plasma energization in the inner magnetosphere and near-Earth magnetotail2020
- Author(s)
  桂華邦裕
- Organizer
  JpGU-AGU Joint Meeting 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Ion Energization During Reconnection-driven Large-scale Injections in Saturn's Magnetotail: Cassini Observations2020
- Author(s)
  桂華邦裕
- Organizer
  Symposium on Planetary Sciences 2020
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Observational study on preferential energization of low-charge-state heavy ions in the near-Earth magnetotail2020
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nose', Y. Miyoshi, T. Hori, I. Shinohara, A. Matsuoka, M. Teramoto, and Y. Ebihara
- Organizer
  SGEPSS 2020 Fall Meeting online
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Observations of mass- and charge-dependent ion energization in the near-Earth magnetotail2020
- Author(s)
  桂華邦裕
- Organizer
  American Geophysical Union Fall Meeting 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00192
[Presentation] Observational study on mass and charge dependence of plasma energization in the inner magnetosphere and near-Earth magnetotail2020
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nose', Y. Miyoshi, T. Hori, and I. Shinohara
- Organizer
  JpGU Meeting 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Observations of mass- and charge-dependent ion energization in the near-Earth magnetotail2020
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nose', Y. Miyoshi, T. Hori, I. Shinohara, A. Matsuoka, M. Teramoto, and Y. Ebihara
- Organizer
  American Geophysical Union 2020 Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H01957
[Presentation] Warm proton populations in the magnetotail under quiet conditions: Statistical analysis based on two-component fits of distribution functions2019
- Author(s)
  桂華邦裕
- Organizer
  Ion Composition of Sun-Earth System meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Mass- and charge-dependent ion energization in Earth's magnetotail: Arase observations2019
- Author(s)
  桂華邦裕
- Organizer
  第146回地球電磁気・地球惑星圏学会秋季講演会
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Transport and energization of ionospheric ions in Earth's magnetotail: Recent multi-spacecraft observations2019
- Author(s)
  K. Keika
- Organizer
  APPC 2019 14th Asia-Pacific Physics Conference
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Mass- and charge-dependent ion energization in Earth's magnetotail: Arase observations2019
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nose', Y. Miyoshi, T. Hori, and I. Shinohara
- Organizer
  SGEPSS 2019 Fall Meeting
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Transport and energization of ionospheric ions in Earth's magnetotail: Recent multi-spacecraft observations2019
- Author(s)
  桂華邦裕
- Organizer
  APPC 2019 14th Asia-Pacific Physics Conference
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Warm proton populations in the magnetotail under quiet conditions: Statistical analysis based on two-component fits of distribution functions2019
- Author(s)
  K. Keika, R. Asami, M. Hoshino, S. Fuselier, and MMS/HPCA team
- Organizer
  Ion Composition of Sun-Earth System meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Proton-Oxygen Differences in Energy Spectral Evolution During Large-scale Injections in Saturn's Magnetosphere2019
- Author(s)
  K. Keika, P. C. Brandt, D.G. Mitchell, and S. Sakai
- Organizer
  SGEPSS 2019 Fall Meeting
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Spatio-temporal Evolution of Energy Spectra of Energetic Protons and Oxygen Ions During Large-scale Injections in Saturn's Magnetosphere2019
- Author(s)
  K. Keika, P. C. Brandt, D. G. Mitchell, M. Kusterer, D. C. Hamilton, and S. Sakai
- Organizer
  Magnetospheres of Outer Planets 2019 Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Statistical study on warm plasma in the magnetotail based on two-component fits of distribution functions2019
- Author(s)
  K. Keika, R. Asami, M. Hoshino, S. Fuselier, and MMS/HPCA team
- Organizer
  JpGU Meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Oxygen-proton differences in ion energies dominating plasma pressure: Dependence on storm phases and solar wind drivers2019
- Author(s)
  桂華邦裕
- Organizer
  日本地球惑星科学連合(JpGU)2019年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Characteristics of ion kinetic energies dominating plasma pressure: Spatial distributions and mass dependence2019
- Author(s)
  桂華邦裕
- Organizer
  Ion Composition of Sun-Earth System meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Characteristics of ion kinetic energies dominating plasma pressure: Spatial distributions and mass dependence2019
- Author(s)
  K. Keika
- Organizer
  Ion Composition of Sun-Earth System meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Statistical study on warm plasma in the magnetotail based on two-component fits of distribution functions2019
- Author(s)
  桂華邦裕
- Organizer
  日本地球惑星科学連合(JpGU)2019年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Ion energization in the near-Earth magnetotail observed by Arase2019
- Author(s)
  桂華邦裕
- Organizer
  American Geophysical Union Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Proton-Oxygen Differences in Energy Spectral Evolution During Large-scale Injections in Saturn's Magnetosphere2019
- Author(s)
  桂華邦裕
- Organizer
  第146回地球電磁気・地球惑星圏学会秋季講演会
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Ion energization in the near-Earth magnetotail observed by Arase2019
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, T. Amano, L. M. Kistler, M. Nose', Y. Miyoshi, T. Hori, and I. Shinohara
- Organizer
  AGU Fall Meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Oxygen-proton differences in ion energies dominating plasma pressure: Dependence on storm phases and solar wind drivers2019
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose', Y. Miyoshi, and I. Shinohara
- Organizer
  JpGU Meeting 2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Contribution from mass-dependent acceleration to the buildup of the ring current: Arase observations2018
- Author(s)
  Keika, K., S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose, T. Amano, Y. Miyoshi, I. Shinohara
- Organizer
  AGU Fall Meeting 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Contribution from oxygen ions to plasma pressure in the inner magnetosphere: Spatial distributions and contributing energies2018
- Author(s)
  桂華邦裕
- Organizer
  SGEPSS 2018 Fall Meeting
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Pc4 ULF waves and proton flux oscillations observed by the Arase satellite in the morning sector during satellite-ground conjunction: Evidence for giant pulsations2018
- Author(s)
  Yamamoto, K., M. Nose, S. Kasahara, S. Yokota, K. Keika, A. Matsuoka, M. Teramoto, R. Nomura, K. Takahashi, M. Vellante, B. Heilig, A. Fujimoto, Y. Tanaka, M. Shinohara, I. Shinohara, Y. Miyoshi
- Organizer
  日本地球惑星科学連合2018年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Calibration of the medium-energy electron/ion analysers onboard ERG (Arase)2018
- Author(s)
  Kasahara, S., S. Yokota, T. Mitani, K. Asamura, Y. Kazama, S-Y. Wang, K. Keika, T. Hori, T-F.Chang, Y. Miyoshi, and I. Shinohara
- Organizer
  CAA cross-calibration and Cluster SOWG
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Mass and Charge Dependent Characteristics of Earth’s Magnetospheric Plasma2018
- Author(s)
  桂華邦裕
- Organizer
  2nd Asia-Pacific Conference on Plasma Physics
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Mass and Charge Dependent Characteristics of Earth’s Magnetospheric Plasma2018
- Author(s)
  桂華邦裕
- Organizer
  2nd Asia-Pacific Conference on Plasma Physics
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Contribution from proton and oxygen ions to plasma pressure in the Earth’s inner magnetosphere: Arase (ERG) observations2018
- Author(s)
  桂華邦裕
- Organizer
  2nd URSI AT-RASC meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Arase (ERG) Observation of Energetic Electrons in the Inner Magnetosphere and Roles of Waves2018
- Author(s)
  Kasahara, S., Y. Miyoshi, S. Yokota, T. Mitani, Y. Kasahara, S. Matsuda, A. Kumamoto, A. Matsuoka, Y. Kazama, H. U. Frey, V. Angelopoulos, S. Kurita, K. Keika, K. Seki, I. Shinohara, K. Asamura, M. Hirahara, T. Takashima
- Organizer
  AOGS
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Arase (ERG) Observation of Electron Scattering by Chorus Waves near the Magnetospheric Equator2018
- Author(s)
  Kasahara, S., Y. Miyoshi, S. Yokota, T. Mitani, Y. Kasahara, S. Matsuda, A. Kumamoto, A. Matsuoka, Y. Kazama, H. U. Frey, V. Angelopoulos, S. Kurita, K. Keika, K. Seki, I. Shinohara
- Organizer
  AT-RASC
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Giant Pulsations Excited by a Steep Earthward Gradient of Proton Phase Space Density: Arase Observation2018
- Author(s)
  Yamamoto, K., M. Nose, S. Kasahara, S. Yokota, K. Keika, A. Matsuoka, M. Teramoto, R. Nomura, K. Takahashi, M. Vellante, B. Heilig, A. Fujimoto, Y. Tanaka, M. Shinohara, I. Shinohara, Y. Miyoshi
- Organizer
  極域・中緯度SuperDARN研究集会
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Contribution from mass-dependent acceleration to the buildup of the ring current: Arase observations2018
- Author(s)
  桂華邦裕
- Organizer
  AGU Fall Meeting 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Drift-bounce resonance between Pc5 pulsations and O+ ions in the nightside magnetosphere: Arase and MMS observations2018
- Author(s)
  Oimatsu, S., M. Nose, M. Teramoto, K. Yamamoto, A. Matsuoka, S. Kasahara, S. Yokota, K. Keika, G. Le, R. Nomura, A. Fujimoto, D. Sormakov, O. Troshichev, Y.-M. Tanaka, M. Shinohara, I. Shinohara, Y. Miyoshi, J. A. Slavin, R. E. Ergun, and P.-A. Lindqvist
- Organizer
  The 3rd Asia Research Node Symposium on Humanosphere Science
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Strong diffusion of energetic electrons into diffuse aurora2018
- Author(s)
  Kasahara, S., Y. Miyoshi, S. Yokota, Y. Kasahara, S. Matsuda, A. Kumamoto, A. Matsuoka, H. U. Frey, V. Angelopoulos, S. Kurita, K. Keika, T. Hori, I. Shinohara
- Organizer
  第144回地球電磁気・地球惑星圏学会総会
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Bounce Resonance between ~10 keV Protons and Poloidal Pc4 waves Observed by Van Allen Probe A2018
- Author(s)
  Yamamoto, K., M. Nose, K. Keika, D. Hartley, C. W. Smith, R. J. MacDowall, D. G. Mitchell, H. Kim
- Organizer
  2018 AGU Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Contribution from proton and oxygen ions to plasma pressure in the Earth’s inner magnetosphere: Arase (ERG) observations2018
- Author(s)
  桂華邦裕
- Organizer
  2nd URSI AT-RASC meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Electron scattering by chorus waves generating pulsating aurora2018
- Author(s)
  Kasahara, S., Y. Miyoshi, S. Yokota, T. Mitani, Y. Kasahara, S. Matsuda, A. Kumamoto, A. Matsuoka, Y. Kazama, H. U. Frey, V. Angelopoulos, S. Kurita, K. Keika, K. Seki, I. Shinohara,Electron scattering by chorus waves generating pulsating aurora
- Organizer
  日本地球惑星科学連合2018年大会
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Contribution from mass-dependent acceleration to the buildup of the ring current: Arase observations2018
- Author(s)
  桂華邦裕
- Organizer
  AGU Fall Meeting 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Magnetic field dipolarization and its associated ion flux variations in the dawn side deep inner magnetosphere: Arase and Michibiki-1 satellite observations2018
- Author(s)
  Nose, M., A. Matsuoka, S. Kasahara, S. Yokota, N. Higashio, H. Koshiishi, S. Imajo, M. Teramoto, R. Nomura, A. Fujimoto, K. Keika, Y. -M. Tanaka, M. Shinohara, I. Shinohara, and Y. Miyoshi
- Organizer
  日本地球惑星科学連合2018年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Spatial distribution of the contributions from electrons, protons, and oxygen ions to energy density in the inner magnetosphere2018
- Author(s)
  Keika, K., S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose, Y. Miyoshi, T. Amano, I. Shinohara
- Organizer
  JpGU 2018 meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Bounce Resonance between ~10 keV Protons and Poloidal Pc4 waves Observed by Van Allen Probe A2018
- Author(s)
  Yamamoto, K., M. Nose, K. Keika, D. Hartley, C. W. Smith, R. J. MacDowall, D. G. Mitchell, H. Kim
- Organizer
  第144回地球電磁気・地球惑星圏学会総会
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Strong diffusion of hot electrons powering diffuse aurora2018
- Author(s)
  Kasahara, S., Y. Miyoshi, S. Yokota, Y. Kasahara, S. Matsuda, A. Kumamoto, A. Matsuoka, H. U. Frey, V. Angelopoulos, S. Kurita, K. Keika, T. Hori, I. Shinohara
- Organizer
  2018 AGU Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Spatial distribution of the contributions from electrons, protons, and oxygen ions to energy density in the inner magnetosphere2018
- Author(s)
  桂華邦裕
- Organizer
  JpGU 2018 meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Contribution from oxygen ions to plasma pressure in the inner magnetosphere: Spatial distributions and contributing energies2018
- Author(s)
  Keika, K., S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose, T. Amano, Y. Miyoshi, I. Shinohara
- Organizer
  SGEPSS 2018 Fall Meeting
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Spatial distribution of the contributions from electrons, protons, and oxygen ions to energy density in the inner magnetosphere2018
- Author(s)
  桂華邦裕
- Organizer
  JpGU 2018 meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Mass and Charge Dependent Characteristics of Earth's Magnetospheric Plasma2018
- Author(s)
  Keika, K.
- Organizer
  2nd Asia-Pacific Conference on Plasma Physics
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Drift-bounce resonance between Pc5 waves and ions: Arase and MMS observations2018
- Author(s)
  Oimatsu, S., M. Nose, M. Teramoto, K. Yamamoto, A. Matsuoka, S. Kasahara, S. Yokota, K. Keika, G. Le, R. Nomura, A. Fujimoto, D. Sormakov, O. Troshichev, Y.-M. Tanaka, M. Shinohara, I. Shinohara, Y. Miyoshi, J. A. Slavin, R. E. Ergun, and P.-A. Lindqvist
- Organizer
  SuperDARN研究集会
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Contribution from oxygen ions to plasma pressure in the inner magnetosphere: Spatial distributions and contributing energies2018
- Author(s)
  桂華邦裕
- Organizer
  SGEPSS 2018 Fall Meeting
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Contribution from proton and oxygen ions to plasma pressure in the Earth’s inner magnetosphere: Arase (ERG) observations2018
- Author(s)
  Keika, K., S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose, Y. Miyoshi, T. Amano, I. Shinohara
- Organizer
  2nd URSI AT-RASC meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] ERG satellite observation of large amplitude Pc5 wave and O+ drift bounce resonance2018
- Author(s)
  Oimatsu, S., M. Nose, M. Teramoto, K. Yamamoto, A. Matsuoka, S. Kasahara, S. Yokota, K. Keika, R. Nomura, A. Fujimoto, D. Sormakov, O. Troshichev, Y.-M. Tanaka, M. Shinohara, I. Shinohara, and Y. Miyoshi
- Organizer
  日本地球惑星科学連合2018年大会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Oxygen impulsive energization during the storm main phase and its contribut2017
- Author(s)
  Kunihiro Keika
- Organizer
  JpGU　meeting 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Magnetic field dipolarization and its associated ion flux variations in the inner magnetosphere: Simultaneous observations by Arase and Michibiki satellites2017
- Author(s)
  Nose, M., A. Matsuoka, S. Kasahara, S. Yokota, N. Higashio, H. Koshiishi, S. Imajo, M. Teramoto, R. Nomura, A. Fujimoto, K. Keika, Y. -M. Tanaka, M. Shinohara, I. Shinohara, and Y. Miyoshi
- Organizer
  AGU fall meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pres2017
- Author(s)
  桂華邦裕
- Organizer
  SGEPSS 2017 Fall Meeting
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Magnetic field dipolarization and its associated ion flux variations in the inner magnetosphere: Simultaneous observations by Arase and Michibiki satellites2017
- Author(s)
  Nose, M., A. Matsuoka, S. Kasahara, S. Yokota, N. Higashio, H. Koshiishi, S. Imajo, M. Teramoto, R. Nomura, A. Fujimoto, K. Keika, Y. -M. Tanaka, M. Shinohara, I. Shinohara, and Y. Miyoshi
- Organizer
  SGEPSS 2017
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Ring current spatio-temporal evolution affected by plasma sheet conditions a2017
- Author(s)
  Kunihiro Keika
- Organizer
  2017 IAPSO-IAMAS-IAGA Joint Assem
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pressure: Arase/MEP-i observations2017
- Author(s)
  桂華邦裕
- Organizer
  SGEPSS 2017 Fall Meeting
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pressure: Arase/MEP-i observations2017
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose', T. Amano, Y. Miyoshi, I. Shinohara
- Organizer
  SGEPSS 2017 Fall Meeting
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pressure: Arase/MEP-i observations2017
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose', T. Amano, Y. Miyoshi, I. Shinohara
- Organizer
  SGEPSS 2017 Fall Meeting
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Oxygen impulsive energization during the storm main phase and its contribution to the ring current buildup2017
- Author(s)
  K. Keika, K. Seki, Y. Miyoshi, M. Nose', L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. Gerrard, H. Spence, B. A. Larsen, J. W. Manweiler
- Organizer
  JpGU meeting 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] 地球磁気圏尾部での重イオンの振る舞い：最近の研究とERG観測に向けて2017
- Author(s)
  桂華邦裕
- Organizer
  名古屋大学宇宙地球環境研究所研究集会「太陽惑星系宇宙プラズマ中の重イオンに関する研究集会
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pressure observed by Arase/MEP-i2017
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose', T. Amano, Y. Miyoshi, I. Shinohara
- Organizer
  AGU 2017 Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14400
[Presentation] Oxygen impulsive energization during the storm main phase and its contribution to the ring current buildup2017
- Author(s)
  Kunihiro Keika
- Organizer
  JpGU　meeting 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pres2017
- Author(s)
  Kunihiro Keika
- Organizer
  AGU 2017 Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pressure observed by Arase/MEP-i2017
- Author(s)
  K. Keika, S. Kasahara, S. Yokota, M. Hoshino, K. Seki, M. Nose', T. Amano, Y. Miyoshi, I. Shinohara
- Organizer
  AGU 2017 Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Ring current spatio-temporal evolution affected by plasma sheet conditions and magnetosphere- ionosphere coupling2017
- Author(s)
  Kunihiro Keika
- Organizer
  2017 IAPSO-IAMAS-IAGA Joint Assembly
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] Ring current spatio-temporal evolution affected by plasma sheet conditions and magnetosphere- ionosphere coupling2017
- Author(s)
  K. Keika
- Organizer
  2017 IAPSO-IAMAS-IAGA Joint Assembly
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] 地球磁気圏尾部での重イオンの振る舞い：最近の研究とERG観測に向けて2017
- Author(s)
  桂華邦裕
- Organizer
  平成28年度名古屋大学宇宙地球環境研究所研究集会「太陽惑星系宇宙プラズマ中の重イオンに関する研究集会」
- Place of Presentation
  大阪電気通信大学（大阪府寝屋川市）
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Energy and mass dependence of the contribution to storm-time plasma pressure observed by Arase/MEP-i2017
- Author(s)
  Kunihiro Keika
- Organizer
  AGU 2017 Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02229
[Presentation] 地球電離圏起源イオンの磁気圏ダイナミクスに対する影響について2016
- Author(s)
  桂華邦裕
- Organizer
  平成28年度名古屋大学宇宙地球環境研究所研究集会「宇宙惑星結合系科学の実証的研究の創設に向けて」
- Place of Presentation
  立教大学（東京都豊島区）
- Invited
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Three-step development of the 17 March 2015 magnetic storm observed by Van Allen Probes2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose', K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. Gerrard, and J. W. Manweiler
- Organizer
  015 ISEE workshop "International GEMSIS and ASINACTR-G2602 Workshop: Future Perspectives of Researches in Space Physics"
- Place of Presentation
  Nagoya University
- Year and Date
  2016-03-23
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Temporal variations of oxygen contribution to the ring current during the 17 March 2015 storm: Van Allen Probes observations2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose, K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, and J. W. Manweiler
- Organizer
  地球電磁気・地球惑星圏学会第140回講演会
- Place of Presentation
  九州大学(福岡県福岡市)
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Three-step development of the 17 March 2015 magnetic storm: Van Allen Probes/RBSPICE observations2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose, K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, and J. W. Manweiler
- Organizer
  日本地球惑星科学連合2016年大会
- Place of Presentation
  幕張メッセ(千葉県千葉市)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Three-step development of the 17 March 2015 magnetic storm: Van Allen Probes/RBSPICE observations2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose', K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, and J. W. Manweiler
- Organizer
  JpGU Meeting 2016
- Place of Presentation
  幕張メッセ（千葉県幕張市）
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] 地球内部磁気圏への酸素イオン供給時期と磁気嵐中の酸素イオン圧突発的増加について2016
- Author(s)
  桂華邦裕
- Organizer
  2015年度名古屋大学太陽地球環境研究所研究集会「太陽惑星系宇宙プラズマ中の重イオンに関する研究会」
- Place of Presentation
  名古屋大学
- Year and Date
  2016-01-27
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes observations of dipolarization and its associated O+ flux variations in the inner magnetosphere at L<6.62016
- Author(s)
  Nose, M., K. Keika, C. A. Kletzing, H. Spence, C. W. Smith, R. J. MacDowall, G. D. Reeves, B. A. Larsen, and D. G. Mitchell
- Organizer
  日本地球惑星科学連合2016年大会
- Place of Presentation
  幕張メッセ(千葉県千葉市)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Temporal variations of oxygen contribution to the ring current during the 17 March 2015 storm: Van Allen Probes observations2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose', K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, and J. W. Manweiler
- Organizer
  地球電磁気・地球惑星圏学会第140回講演会
- Place of Presentation
  九州大学（福岡県福岡市）
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes衛星で観測された内部磁気圏EMIC波動とイオン速度分布関数2016
- Author(s)
  桂華邦裕
- Organizer
  平成28年度名古屋大学宇宙地球環境研究所研究集会「ERG衛星観測に向けたEMIC波動および関連現象に関する研究集会」
- Place of Presentation
  宇宙科学研究所（神奈川県相模原市）
- Invited
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Oxygen energization and loss during the main phase of the 17 March 2015 storm: Van Allen Probes observations2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose', K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, J. W. Manweiler, H. E. Spence, and B. Larsen
- Organizer
  AGU Fall Meeting 2016
- Place of Presentation
  Moscone Center, San Francisco, CA, USA
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Oxygen energization and loss during the main phase of the 17 March 2015 storm: Van Allen Probes observations2016
- Author(s)
  K. Keika, Y. Miyoshi, S. Machida, M. Nose, K. Seki, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, J. W. Manweiler, H. E. Spence, and B. Larsen
- Organizer
  AGU Fall Meeting 2016
- Place of Presentation
  サンフランシスコ(米国)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04057
[Presentation] Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations2015
- Author(s)
  Nose, M., S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, and B. A. Larsen
- Organizer
  IUGG 2015
- Place of Presentation
  チェコ・プラハ
- Year and Date
  2015-06-24
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Impulsive enhancements of oxygen ions in the inner magnetosphere during the storm main phase: Van Allen Probes/RBSPICE observations2015
- Author(s)
  K. Keika, K. Seki, M. Nose', S. Machida, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, and A. Ukhorskiy
- Organizer
  Inner Magnetosphere Coupling III
- Place of Presentation
  University of California Los Angeles, Los Angeles, LA
- Year and Date
  2015-03-24
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes observations of dipolarization and its associated O+ flux variations in the inner magnetosphere2015
- Author(s)
  Nose, M., K. Keika, C. A. Kletzing, C. W. Smith, R. J. MacDowall, G. D. Reeves, and H. Spence
- Organizer
  第138回地球電磁気・地球惑星圏学会総会
- Place of Presentation
  東京都・文京区
- Year and Date
  2015-11-01
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations2015
- Author(s)
  M. Nose, S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, and B. A. Larsen
- Organizer
  Korea Space Science Society spring meeting
- Place of Presentation
  Taebaek, Korea
- Year and Date
  2015-04-30
- Invited
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations2015
- Author(s)
  M. Nose, S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, and B. A. Larsen
- Organizer
  26th General Assembly of the International Union of Geodesy and Geophysics
- Place of Presentation
  Prague, Czech Republic
- Year and Date
  2015-06-24
- Invited
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Properties of energetic ion PSD during storm-time substorms observed by Van Allen Probes2015
- Author(s)
  K. Mitani, K. Seki, K. Keika, L. J. Lanzerrotti, M. Gkioulidou, D. G. Mitchel, and C. A. Kletzing
- Organizer
  Inner Magnetosphere Coupling III
- Place of Presentation
  University of California Los Angeles, Los Angeles, LA
- Year and Date
  2015-03-24
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] 2015年1月7日および3月18日の磁気嵐におけるリングカレントイオンの特徴2015
- Author(s)
  桂華邦裕, 関華奈子, 能勢正仁, 町田忍, 三好由純, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou
- Organizer
  地球電磁気・地球惑星圏学会第138回講演会
- Place of Presentation
  東京大学
- Year and Date
  2015-11-01
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] 2015年3月17日磁気嵐中のリングカレントイオンの振る舞いについて2015
- Author(s)
  桂華邦裕
- Organizer
  第5回極端宇宙天気現象研究会
- Place of Presentation
  名古屋大学
- Year and Date
  2015-11-12
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations2015
- Author(s)
  Nose, M., S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, and B. A. Larsen
- Organizer
  Asia Oceania Geosciences Society 12th Annual Meeting
- Place of Presentation
  シンガポール・シンガポール
- Year and Date
  2015-08-07
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Characteristics of ring current protons and oxygen ions during the 7 January 2015 and 17 March 2015 storms: Van Allen Probes/RBSPICE observations2015
- Author(s)
  Kunihiro Keika, K. Seki, M. Nose', S. Machida, Y. Miyoshi, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, A. J. Gerrard, and J. W. Manweiler
- Organizer
  2015 AGU Fall Meeting
- Place of Presentation
  Moscone Center, San Francisco
- Year and Date
  2015-12-17
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Key unresolved issues to be addressed by in-situ ion measurements in the Earth’s inner magnetosphere: ERG and Van Allen Probes collaborations2015
- Author(s)
  K. Keika
- Organizer
  ISAS Symposium - Magnetospheric Plasmas 2015
- Place of Presentation
  Tokyo Institute of Technology
- Year and Date
  2015-12-03
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes observations of dipolarization and ion acceleration in the inner magnetosphere2015
- Author(s)
  Nose, M., K. Keika, C. A. Kletzing, C. W. Smith, R. J. MacDowall, and G. D. Reeves
- Organizer
  日本地球惑星科学連合2015年大会
- Place of Presentation
  茨城県・幕張
- Year and Date
  2015-05-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Impulsive enhancements of oxygen ions in the inner magnetosphere: Van Allen Probes RBSPICE observations2015
- Author(s)
  K. Keika, K. Seki, M. Nose', S. Machida, L. J. Lanzerotti, D. G. Mitchell, M. Gkioulidou, and A. Ukhorskiy
- Organizer
  Japan Geoscience Union Meeting 2015
- Place of Presentation
  幕張メッセ
- Year and Date
  2015-05-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes observations of dipolarization and its associated O+ flux variations in the inner magnetosphere2015
- Author(s)
  Nose, M., K. Keika, C. A. Kletzing, C. W. Smith, R. J. MacDowall, G. D. Reeves, and H. Spence
- Organizer
  2015 AGU Fall Meeting
- Place of Presentation
  アメリカ・サンフランシスコ
- Year and Date
  2015-12-18
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Properties of energetic ion PSD during storm-time substorms observed by Van Allen Probes2014
- Author(s)
  K. Mitani, K. Seki, K. Keika, L. J. Lanzerrotti, M. Gkioulidou, D. G. Mitchel, and C. A. Kletzing
- Organizer
  The 12th International Conference on Substorms
- Place of Presentation
  Ise-shima Royal Hotel, Ise, Japan
- Year and Date
  2014-11-12
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes衛星搭載RBSPICE粒子検出器による磁気嵐中高エネルギー水素および酸素イオンの複数点観測2014
- Author(s)
  桂華邦裕, 関華奈子, 能勢正仁, 町田忍, L. J. Lanzerotti, M. Gkioulidou, A. Ukhorskiy, D. G. Mitchell
- Organizer
  地球電磁気・地球惑星圏学会第136回講演会
- Place of Presentation
  キッセイ文化ホール
- Year and Date
  2014-11-01
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Ion composition and energization in the Earth’s inner magnetosphere and the effects on the ring current buildup2014
- Author(s)
  K. Keika, L. M. Kistler, P. C. Brandt, K. Seki, M. Nose', S. Machida, L. J. Lanzerotti, M. Gkioulidou, A. Ukhorskiy, and D. G. Mitchell
- Organizer
  2014 AGU Fall Meeting
- Place of Presentation
  Moscone Center, San Francisco, CA.
- Year and Date
  2014-12-16
- Invited
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Properties of energetic ion PSD during storm-time substorms observed by Van Allen Probes2014
- Author(s)
  K. Mitani, K. Seki, K. Keika, L. J. Lanzerrotti, M. Gkioulidou, D. G. Mitchel, and C. A. Kletzing
- Organizer
  地球電磁気・地球惑星圏学会第136回講演会
- Place of Presentation
  キッセイ文化ホール
- Year and Date
  2014-11-03
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Van Allen Probes observations of oxygen torus in the inner magnetosphere2014
- Author(s)
  Nose, M., K. Keika, C. A. Kletzing, C. W. Smith, R. J. MacDowall, W. S. Kurth, and S. De Pascuale
- Organizer
  日本地球惑星科学連合2014年大会
- Place of Presentation
  神奈川県・横浜
- Year and Date
  2014-04-28
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Energetic protons and oxygen ions observed by Van Allen Probes/RBSPICE during storm-time substorms2014
- Author(s)
  K. Keika, K. Seki, M. Nose', S. Machida, L. J. Lanzerotti, M. Gkioulidou, A. Ukhorskiy, and D. G. Mitchell
- Organizer
  The 12th International Conference on Substorms
- Place of Presentation
  Ise-shima Royal Hotel, Ise, Japan
- Year and Date
  2014-11-13
- Data Source
  KAKENHI-PROJECT-26800257
[Presentation] Magnetic fluctuations embedded in dipolarization inside geosynchronous orbit and their possible role in selective acceleration of O+ ions
- Author(s)
  Nose, M., K. Takahashi, K. Keika, K. Koga, H. Koshiishi, and H. Matsumoto
- Organizer
  IAGA 2013
- Place of Presentation
  Merida, Mexico
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Magnetic fluctuations embedded in dipolarization inside geosynchronous orbit and their possible role in selective acceleration of O+ ions
- Author(s)
  Nose, M., K. Takahashi, K. Keika, K. Koga, H. Koshiishi, and H. Matsumoto
- Organizer
  日本地球惑星科学連合2013年大会
- Place of Presentation
  千葉県・幕張
- Invited
- Data Source
  KAKENHI-PROJECT-25287127
[Presentation] Search for oxygen torus in the inner magnetosphere: Van Allen Probes observations
- Author(s)
  Nosé, M., S. Oimatsu, K. Keika, C. A. Kletzing, C. W. Smith, R. J. MacDowall, W. S. Kurth, and S. De Pascuale
- Organizer
  2013 AGU Fall Meeting
- Place of Presentation
  San Francisco
- Data Source
  KAKENHI-PROJECT-25287127

1. Nose Masahito (90333559)

# of Collaborated Projects: 3 results

# of Collaborated Products: 44 results
2. 笠原慧 (00550500)

# of Collaborated Projects: 3 results

# of Collaborated Products: 37 results
3. 海老原祐輔 (80342616)

# of Collaborated Projects: 3 results

# of Collaborated Products: 3 results
4. OBANA Yuki (50398096)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
5. Seki Kanako (20345854)

# of Collaborated Projects: 2 results

# of Collaborated Products: 2 results
6. 横田勝一郎 (40435798)

# of Collaborated Projects: 2 results

# of Collaborated Products: 29 results
7. 小川泰信 (00362210)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
8. 寺田直樹 (70470060)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
9. MIYASHITA Yukinaga (20435811)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
10. NOMURA Reiko (30637690)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
11. NAKANO Shinya (40378576)

# of Collaborated Projects: 1 results

# of Collaborated Products: 5 results
12. SHOJI Masafumi (80722082)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
13. Hoshino Masahiro (90241257)

# of Collaborated Projects: 1 results

# of Collaborated Products: 2 results
14. 寺本万里子 (10614331)

# of Collaborated Projects: 1 results

# of Collaborated Products: 9 results
15. 平原聖文 (50242102)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
16. 山本和弘 (30888730)

# of Collaborated Projects: 1 results

# of Collaborated Products: 5 results
17. Lanzerotti Louis J.

# of Collaborated Projects: 1 results

# of Collaborated Products: 12 results
18. Spence Harlan

# of Collaborated Projects: 1 results

# of Collaborated Products: 2 results
19. AMANO Takanobu

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results
20. HORI Tomoaki

# of Collaborated Projects: 0 results

# of Collaborated Products: 5 results
21. OYAMA Shin-ichiro

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
22. 松田昇也

# of Collaborated Projects: 0 results

# of Collaborated Products: 5 results
23. 三好由純

# of Collaborated Projects: 0 results

# of Collaborated Products: 6 results
24. 塩川和夫

# of Collaborated Projects: 0 results

# of Collaborated Products: 4 results
25. 篠原育

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
26. 松岡彩子

# of Collaborated Projects: 0 results

# of Collaborated Products: 4 results
27. 塩田大幸

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
28. 齋藤義文

# of Collaborated Projects: 0 results

# of Collaborated Products: 3 results
29. 北村成寿

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Keika Kunihiro 桂華 邦裕

KEIKA Kunihiro 桂華 邦裕

Research Projects

Research Products

Co-Researchers

Study of ion composition in the lunar plasma environment by using Gateway/HERMES

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Study on oxygen ion energization in the near-Earth magnetotail using multi-spacecraft observations and particle tracing simulationPrincipal Investigator

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Study on effects of the intrinsic magnetic field strength on planetary atmospheres and space environments based on comparisons of terrestrial planets

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Physics of energy partition between ion and electron during magnetic reconnection

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Study on spatio-temporal variations of oxygen ring current enhancements during magnetic storms using multi-spacecraft observationsPrincipal Investigator

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Investigation of ion composition change in the inner magnetosphere based on multi-satellite observations and numerical simulations

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Effects of intrinsic magnetic fields on the planetary magnetosphere/ionosphere environment based on comparison of Mars and Earth

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Study on the acceleration and loss of ring current ions using multiple spacecraft in the inner magnetospherePrincipal Investigator

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Investigation of creation and transport mechanisms of energetic ions in deep inner magnetosphere and their dependence on ion species

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[Journal Article] Characteristic E-Region Plasma Signature of Magnetospheric Wave-Particle Interactions2025

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[Journal Article] Detection of ultrafast electron energization by whistler-mode chorus waves in the magnetosphere of Earth2025

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[Journal Article] Direct Evidence for Electron Pitch Angle Scattering Driven by Electrostatic Cyclotron Harmonic Waves2025

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[Journal Article] Statistical Survey of Loss Cone Electrons Observed In Situ in the Inner Magnetosphere2025

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[Journal Article] Magnetic storm-time red aurora as seen from Hokkaido, Japan on December 1, 2 2023 associated with high-density solar wind2024

Keika Kunihiro 桂華邦裕

KEIKA Kunihiro 桂華邦裕