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

2012 Fiscal Year Final Research Report

• 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
• 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

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 the magnetic reconnection and initial dipolarization regions in the near-Earth magnetotail associated with substorm expansion onsets (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 Pages: A11214
  • DOI: 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., I. A. Chernyaev, S. V. Dubyagin, Y. Miyashita, V. Angelopoulos, P. D. Boakes, R. Nakamura, and M. G. Henderson
  • Journal Title: Journal of Geophysical Research Volume: 117 Pages: A10207
  • DOI: 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 Pages: A09221
  • DOI: 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: DOI:10.1007/978-94-007-0501-2_7
  • 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): Ogasawara, K., Y. Kasaba, Y. Nishimura, T. Hori, T. Takada, Y. Miyashita, V. Angelopoulos, S. B. Mende, and J. Bonnell
  • Journal Title: Journal of Geophysical Research Volume: 1126 Pages: A06209
  • DOI: DOI:10.1029/2010JA016032
  • 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: Journal of Geophysical Research Volume: 115 Pages: A12239
  • DOI: DOI:10.1029/2010JA015608,2010
  • Peer Reviewed
• [Journal Article] Identification of substorm onset location and preonset sequence using Reimei, THEMIS GBO, PFISR, and Geotail (2010)
  • Author(s): Zou, S., M. B. Moldwin, L. R. Lyons, Y. Nishimura, M. Hirahara, T. Sakanoi, K. Asamura, M. J. Nicolls, Y. Miyashita, S. B. Mende, and C. J. Heinselman
  • Journal Title: Journal of Geophysical Research Volume: 115 Pages: A12309
  • DOI: 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, Y. Kasaba, H. Misawa, F. Tsuchiya, R. Kataoka, A. Kadokura, T. Mukai, K. Yumoto, D. J. Menietti, G. Parks, K. Liou, F. Honary, and E. Donovan
  • Journal Title: Journal of Geophysical Research Volume: 115 Pages: A11213
  • DOI: DOI:10.1029/2010JA015361
  • 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] 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] 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 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 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] 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] 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] 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