Study of energy release processes associated with substorm onsets in the Earth's magnetosphere based on multispacecraft observations

• Project/Area Number: 22740321
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Space and upper atmospheric physics
• Research Institution: Nagoya University
• Principal Investigator: MIYASHITA Yukinaga 名古屋大学, 太陽地球環境研究所, 研究員 (20435811)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: サブストーム / 磁気圏尾部 / エネルギー解放 / 磁気リコネクション / 磁場双極子化 / オーロラ / 衛星多点観測 / 磁気圏

Research Abstract

To understand the triggering mechanism of substorms accompanied by severe auroral activity, we have studied energy release processes and transport in the Earth’s magnetotail, based on multispacecraft observations. We revealed energy balance and transport at substorm onsets midway between the magnetic reconnection and initial dipolarization regions as well as in the initial dipolarizationregion. In particular, we showed that energy carried by fast plasma flows from the magnetic reconnection region is not sufficient for that related to the initial dipolarization in the near-Earth magnetotail.

Research Products

• [Journal Article] A statistical study of energy release and transport midway between themagnetic reconnection and initial dipolariza- tion regions in the near-Earth magneto- tail (2012)
  • Author(s): Miyashita, Y., S. Machida, M. Nose, K. Liou, Y. Saito, and W. R. Paterson
  • Journal Title: Journal of Geophysical Research Volume: 117 Issue: A11
  • DOI: 10.1029/2012ja017925
  • Peer Reviewed
• [Journal Article] Energetic particle injections to geostationary orbit: Relationship to flow bursts and magnetospheric state (2012)
  • Author(s): Sergeev, V. A.
  • Journal Title: Journal of Geophysical Research Volume: 117 Issue: A10
  • DOI: 10.1029/2012ja017773
  • Peer Reviewed
• [Journal Article] Successive substorm expansions during a period of prolonged northward interplanetary magnetic field (2011)
  • Author(s): Miyashita, Y., Y. Kamide, K. Liou, C.-C. Wu, A. Ieda, N. Nishitani, S. Machida, Y. Saito, and T. Mukai
  • Journal Title: Journal of Geophysical Research Volume: 116 Issue: A9 Pages: n/a-n/a
  • DOI: 10.1029/2011ja016719
  • Peer Reviewed
• [Journal Article] A statistical study of pressure changes in the near-Earth magnetotail associated with substorm expansion onsets, in The Dynamic Magnetosphere (2011)
  • Author(s): Miyashita, Y., S. Machida, and A. Ieda
  • Journal Title: IAGA Special Sopron Book Series Volume: 3 Pages: 125-132
  • DOI: 10.1007/978-94-007-0501-2_7
  • ISBN: 9789400705005, 9789400705012
  • Peer Reviewed
• [Journal Article] Azimuthal auroral expansion associated with fast flows in thenear-Earth plasma sheet: Coordinated observations of the THEMIS all-sky imagers and multiple spacecraft (2011)
  • Author(s): Ogasawara, K., Y. Kasaba, Y. Nishimura, T. Hori, T. Takada, Y. Miyashita, 他
  • Journal Title: Journal of Geophysical Research Volume: 116 Issue: A6 Pages: n/a-n/a
  • DOI: 10.1029/2010ja016032
  • Peer Reviewed
• [Journal Article] Magnetic reconnection X-line retreat associated with dipolarization of the Earth's magnetosphere (2011)
  • Author(s): M.Oka
  • Journal Title: Geophysical Research Letters Volume: 38 Issue: 20 Pages: n/a-n/a
  • DOI: 10.1029/2011gl049350
  • Peer Reviewed
• [Journal Article] Azimuthal auroral expansion associated with fast flows in the near-Earth plasma sheet : Coordinated observations of the THEMIS all-sky imagers and multiple spacecraft (2011)
  • Author(s): K.Ogasawara
  • Journal Title: Journal of Geophysical Research Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Pressure changes associated with substorm dipolarization in the near-Earth plasma sheet (2010)
  • Author(s): Miyashita, Y., S. Machida, A. Ieda, D. Nagata, Y. Kamide, M. Nose, K. Liou, T. Mukai, S. P. Christon, C. T. Russell, I. Shinohara, and Y. Saito
  • Journal Title: J. Geophys. Res. Volume: 115 Issue: A12
  • DOI: 10.1029/2010ja015608
  • Peer Reviewed
• [Journal Article] Identification of substorm onset location and pre-onset sequence using Reimei, THEMIS GBO and PFISR (2010)
  • Author(s): Zou, S., M. Moldwin, L. Lyons, Y. Nishimura, M. Hirahara, T. Sakanoi, K. Asamura, M. Nicolls, S. B. Mende, C. Heinselman
  • Journal Title: J. Geophys. Res. Volume: 115(12) Issue: A12
  • DOI: 10.1029/2010ja015520
  • Peer Reviewed
• [Journal Article] Two step evolution of auroral acceleration at substorm onset (2010)
  • Author(s): Morioka A., Y. Miyoshi, Y. Miyashita,他12名
  • Journal Title: Journal of Geophysical Research Volume: 115 Issue: A11
  • DOI: 10.1029/2010ja015361
  • Peer Reviewed
• [Journal Article] Observations of magnetic reconnection in the magnetotail associated with substorms (2010)
  • Author(s): Y.Miyashita
  • Journal Title: Chinese Journal of Space Science Volume: 30 Pages: 312-320
  • Peer Reviewed
• [Journal Article] Pressure changes associated with substorm dipolarization in the near-Earth plasma sheet (2010)
  • Author(s): Y.Miyashita
  • Journal Title: Journal of Geophysical Research Volume: 115
  • Peer Reviewed
• [Journal Article] Electron acceleration signatures in the magnetotail associated with substorms (2010)
  • Author(s): Y.Asano
  • Journal Title: Journal of Geophysical Research Volume: 115
  • Peer Reviewed
• [Journal Article] Two-step evolution of auroral acceleration at substorm onset (2010)
  • Author(s): A.Morioka
  • Journal Title: Journal of Geophysical Research Volume: 115
  • Peer Reviewed
• [Journal Article] Identification of substorm onset location and preonset sequence using Reimei, THEMIS GBO, PFISR, and Geotail (2010)
  • Author(s): S.Zou
  • Journal Title: Journal of Geophysical Research Volume: 115
  • Peer Reviewed
• [Presentation] On the transition between the inner plasma sheet and the outer plasma sheet in the Earth's magnetotail (2012)
  • Author(s): Miyashita, Y
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2012-12-07
• [Presentation] 地球磁気圏尾部の内部プラズマシートと外部プラズマシートの遷移について (2012)
  • Author(s): 宮下幸長
  • Organizer: 第132回地球電磁気・地球惑星圏学会
  • Place of Presentation: 札幌
  • Year and Date: 2012-10-21
• [Presentation] Relationship between substorm-associated processes in the magnetotail and plasma sheet structure (2012)
  • Author(s): Miyashita, Y
  • Organizer: 11th International Conference on Substorms
  • Place of Presentation: Luneburg, Germany
  • Year and Date: 2012-09-06
• [Presentation] Relationship between substorm-associated processes in the magnetotail and plasma sheet structure (2012)
  • Author(s): Y.Miyashita
  • Organizer: GEMSIS International Workshop (Nagoya University Global COE QFPU International Workshop, 2011 STEL Workshop)-Current Status and Future Perspectives in Space Weather Researches
  • Place of Presentation: 名古屋大学(愛知県名古屋市)
  • Year and Date: 2012-03-14
• [Presentation] 磁気圏尾部のサブストーム過程とプラズマシート構造の関係 (2011)
  • Author(s): 宮下幸長
  • Organizer: 第130回地球電磁気・地球惑星圏学会
  • Place of Presentation: 神戸大学
  • Year and Date: 2011-11-03
• [Presentation] 磁気圏尾部のサブストーム過程とプラズマシート構造の関係 (2011)
  • Author(s): 官下幸長
  • Organizer: 第130回地球電磁気・地球惑星圏学会
  • Place of Presentation: 神戸大学(兵庫県神戸市)
  • Year and Date: 2011-11-03
• [Presentation] Magnetotail reconnection associated with storm time substorms (2011)
  • Author(s): Y.Miyashita
  • Organizer: 2011 International Conference on Storms, Substorms, and Space Weather
  • Place of Presentation: Liutong Hotel (Hangzhou, China)(招待講演)
  • Year and Date: 2011-09-23
• [Presentation] Observations of the ballooning and interchange instabilities in the near-Earth magnetotail at substorm expansion onsets (2011)
  • Author(s): Y.Miyashita
  • Organizer: Workshop on Physical Processes in Non-Uniform Finite Magnetospheric Systems-50 Years of Tamao's Resonant Mode Coupling Theory-
  • Place of Presentation: 九州大学(福岡県福岡市)(招待講演)
  • Year and Date: 2011-09-15
• [Presentation] 磁気圏尾部のサブストーム過程とプラズマシート構造の関係 (2011)
  • Author(s): 宮下幸長
  • Organizer: 平成23年度名古屋大学太陽地球環境研究所研究集会「サブストーム開始機構研究会」
  • Place of Presentation: 名古屋大学(愛知県名古屋市)
  • Year and Date: 2011-08-22
• [Presentation] サブストーム開始に伴う対流の増大 (2011)
  • Author(s): 宮下幸長
  • Organizer: 平成22年度国立極地研究所研究集会「SuperDARNによる極域超高層大気研究集会～今後取組むべき重点課題の戦略～」
  • Place of Presentation: 国立極地研究所(東京都立川市)(招待講演)
  • Year and Date: 2011-07-25
• [Presentation] Energy release midway between the magnetic reconnection and initial dipolarization regions in the near-Earth magnetotail and its role in the substorm onset (2011)
  • Author(s): Miyashita, Y
  • Organizer: IUGG 2011 General Assembly
  • Place of Presentation: Melbourne, Australia
  • Year and Date: 2011-07-06
• [Presentation] Energy release midway between the magnetic reconnection and initial dipolarization regions in the near-Earth magnetotail and its role in the substorm onset (2011)
  • Author(s): Y.Miyashita
  • Organizer: IUGG 2011 General Assembly
  • Place of Presentation: Melbourne Convention & Exhibition Centre (Melbourne, Australia)
  • Year and Date: 2011-07-06
• [Presentation] Energy release between the tail magnetic reconnection and dipolarization regions and its role in the substorm onset (2011)
  • Author(s): Miyashita, Y
  • Organizer: Japan Geoscience Union Meeting 2011
  • Place of Presentation: Makuhari, Chiba
  • Year and Date: 2011-05-27
• [Presentation] Energy release between the tail magnetic reconnection and dipolarization regions and its role in the substorm onset (2011)
  • Author(s): Y.Miyashita
  • Organizer: Japan Geosdence Union Meeting 2011
  • Place of Presentation: 幕張メッセ国際会議場(千葉市美浜区)(招待講演)
  • Year and Date: 2011-05-27
• [Presentation] Energy release and transport in the near-Earth magnetotail associated with substorms: THEMIS observations (2010)
  • Author(s): Miyashita, Y
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2010-12-16
• [Presentation] Energy release and transport in the near-Earth magnetotail associated with substorms : THEMIS observations (2010)
  • Author(s): Y.Miyashita
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: Moscone Convention Center (San Francisco, USA)
  • Year and Date: 2010-12-16
• [Presentation] 磁気圏近尾部におけるサブストームに伴うエネルギーの解放と輸送: THEMIS 衛星の観測 (2010)
  • Author(s): 宮下幸長
  • Organizer: 第128回地球電磁気・地球惑星圏学会
  • Place of Presentation: 沖縄・那覇
  • Year and Date: 2010-10-31
• [Presentation] 磁気圏近尾部におけるサブストームに伴うエネルギーの解放と輸送:THEMIS衛星の観測 (2010)
  • Author(s): 宮下幸長
  • Organizer: 第128回地球電磁気・地球惑星圏学会
  • Place of Presentation: 沖縄県市町村自治会館(沖縄県那覇市)
  • Year and Date: 2010-10-31
• [Presentation] Evolution of the near-Earth magnetotail associated with substorm expansion onsets : Geotail and THEMIS observations (2010)
  • Author(s): Y.Miyashita
  • Organizer: 2010 STEL-KASI Workshop on Space Weather
  • Place of Presentation: 名古屋大学(愛知県名古屋市)
  • Year and Date: 2010-10-18
• [Presentation] Evolution of the near-Earth magnetotail associated with substorm expansion onsets (2010)
  • Author(s): Y.Miyashita
  • Organizer: 平成22年度名古屋大学太陽地球環境研究所研究集会「第6回磁気圏-電離圏複合系における対流に関する研究会」、「サブストーム開始機構研究会」、「STE現象解析ワークショップ」合同研究会
  • Place of Presentation: 名古屋大学(愛知県名古屋市)
  • Year and Date: 2010-09-06
• [Presentation] 磁気圏尾部におけるサブストームに伴うエネルギーの解放と輸送 (2010)
  • Author(s): 宮下幸長
  • Organizer: 平成22年度名古屋大学太陽地球環境研究所研究集会「多点衛星・地上データ解析による磁気圏ダイナミクス研究会」
  • Place of Presentation: 高知工業高等専門学校(高知県南国市)
  • Year and Date: 2010-08-20
• [Presentation] Pressure changes in the near-Earth magnetotail associated with substorm expansion onsets: THEMIS observations (2010)
  • Author(s): Miyashita, Y
  • Organizer: 2010 International Space Plasma Symposium
  • Place of Presentation: Tainan, Taiwan
  • Year and Date: 2010-06-29
• [Presentation] Pressure changes in the near-Earth magnetotail associated with substorm expansion onsets : THEMIS observations (2010)
  • Author(s): Y.Miyashita
  • Organizer: 2010 International Space Plasma Symposium
  • Place of Presentation: National Cheng Kung University (Tainan, Taiwan)
  • Year and Date: 2010-06-29
• [Presentation] THEMIS 衛星の観測によるサブストーム開始時の磁気圏近尾部の圧力変化 (2010)
  • Author(s): 宮下幸長
  • Organizer: 日本地球惑星科学連合 2010 年大会
  • Place of Presentation: 千葉・幕張
  • Year and Date: 2010-05-26
• [Presentation] THEMIS衛星の観測によるサブストーム開始時の磁気圏近尾部の圧力変化 (2010)
  • Author(s): 宮下幸長
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉市美浜区)
  • Year and Date: 2010-05-26
• [Presentation] 磁気圏近尾部におけるサブストームの磁場双極子化開始時の磁場変動
  • Author(s): 宮下幸長
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 千葉・幕張
• [Presentation] Relationship between substorm-associated processes in the magnetotail and plasma sheet structure
  • Author(s): Y. Miyashita
  • Organizer: 11th International Conference on Substorms
  • Place of Presentation: Lueneburg, Germany
• [Presentation] サブストーム開始時の磁気圏近尾部におけるエネルギー収支
  • Author(s): 宮下幸長
  • Organizer: 平成24年度名古屋大学太陽地球環境研究所研究集会「サブストーム開始機構研究会」
  • Place of Presentation: 名古屋大学
• [Presentation] Structure of the plasma sheet in the Earth's magnetotail and locations of substorm-associated processes
  • Author(s): Y. Miyashita
  • Organizer: GEOTAIL 20th Anniversary Workshop
  • Place of Presentation: Tokyo Institute of Technology
• [Presentation] On the transition between the inner plasma sheet and the outer plasma sheet in the Earth's magnetotail
  • Author(s): Y. Miyashita
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
• [Presentation] プラズマシートから内部磁気圏へのプラズマの輸送
  • Author(s): 宮下幸長
  • Organizer: 平成24年度名古屋大学太陽地球環境研究所研究集会「内部磁気圏研究集会」、「ERGプロジェクト研究集会」、「GEMSIS電磁気圏ワークショップ」合同研究集会
  • Place of Presentation: 愛知・犬山