VLF/LF radio wave observation of radiation belt electrons into the atmosphere during geomagnetic storms

• Project/Area Number: 20740281
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Space and upper atmospheric physics
• Research Institution: Tohoku University
• Principal Investigator: TSUCHIYA Fuminori Tohoku University, 大学院・理学研究科, 助教 (10302077)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 放射線帯 / 磁気嵐 / 長波標準電波 / サブストーム / 電離圏 / D領域

Research Abstract

Man-made VLF/LF radio wave observations have been started at Ny-Alsound in Norway and Athabasca in Canada. These observations have been used to study precipitations of high-energy (>100keV) electrons into the atmosphere during the geomagnetic storm and substorm. Local time distribution of the electron precipitation events was examined and was compared with the substorm onset timing. The data indicates that plasma wave are responsible for the energetic electron precipitation into the atmosphere through the pitch angle scattering.

Research Products

• [Journal Article] Storm-time electron flux precipitation in the inner radiation belt caused by wave-particle interactions (2009)
  • Author(s): Tadokoro, H., F.Tsuchiya, Y.Miyoshi, Y.Katoh, A.Morioka, H.Misawa
  • Journal Title: Ann Geophysica 27,6 Pages: 1669-1677
  • Peer Reviewed
• [Journal Article] Monitoring of Lightning Activity in Southeast Asia : Scientific Objectives and Strategies (2008)
  • Author(s): Adachi, T., Y.Takashashi, H.Ohya, F.Tsuchiya, K.Yamashita, M.Yamamoto, H.Hashiguchi
  • Journal Title: Kyoto Working Papers on Area Studies No.13 Pages: 1-20
  • NAID: 120004108301
• [Presentation] 東南アジアにおけるVLF/LF帯電磁波観測ネットワークシステム(AVON)についてAsian VLF Observation Network : AVON (2011)
  • Author(s): 大矢浩代, 土屋史紀, 山下幸三, 高橋幸弘, 塩川和夫, 三好由純
  • Organizer: 宇宙天気に関する地上観測ネットワークの構築へ向けた研究集会
  • Place of Presentation: 福岡
  • Year and Date: 2011-03-01
• [Presentation] ニーオルセンにおけるLF帯電波観測から得られた高エネルギー電子の大気降下現象 (2011)
  • Author(s): 土屋史紀, 森岡昭, 森岡昭, 三好由純, 塩川和夫, 菊池崇, 小川泰信
  • Organizer: NIPR研究集会「昭和基地におけるULF/ELF/VLF電磁波観測の展望」
  • Place of Presentation: 立川
  • Year and Date: 2011-02-22
• [Presentation] 高緯度地域でのVLF/LF帯波動観測による放射線帯電子損失過程の実証的研究 (2010)
  • Author(s): Tsuchiya, F., A.Morioka, H.Misawa, S.Sato, Y.Miyoshi, K.Shiokawa, T.Kikuchi, Y.Ogawa, M.Connors
  • Organizer: GEMSIS-太陽、磁気圏、電離圏ワークショップ2010
  • Place of Presentation: 犬山
  • Year and Date: 2010-12-27
• [Presentation] The radiation belt electron loss into the atmosphere : initial results from LF radio observation at Ny-Alesund (2010)
  • Author(s): 土屋史紀、森岡昭、森岡昭、三好由純、塩川和夫、菊池崇、小川泰信
  • Organizer: 第34回極域宙空圏シンポジウム
  • Place of Presentation: 立川
  • Year and Date: 2010-12-02
• [Presentation] Storm time loss of radiation belt electrons into the atmosphere : initial results from VLF/LF observation at Ny-Alesund (2010)
  • Author(s): Tsuchiya, F., H.Misawa, A.Morioka, Y.Mioyshi, K.Shiokawa, T.Kikuchi, Y.Ogawa
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 那覇
  • Year and Date: 2010-10-31
• [Presentation] Electron density changes in the night time lower ionosphere associated with lightning-EMP (2010)
  • Author(s): Tsuchiya, F., T.Adachi, Y.Takahashi, K.Yamashita, H.Ohya, M.Sato, M.-Y.Yamamoto, H.Misawa, A.Morioka, Y.Mioyshi, K.Shiokawa, T.Kikuchi
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 那覇
  • Year and Date: 2010-10-31
• [Presentation] Mapping of the tweek reflection height observed by low-mid latitude VLF network system (2010)
  • Author(s): 大矢浩代, 土屋史紀, 山下幸三, 高橋幸弘、塩川和夫, 三好由純
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 那覇
  • Year and Date: 2010-10-31
• [Presentation] Statistical Analysis on Occurrence of Lighting Associated VLF/LF Events Observed in the East Asia (2010)
  • Author(s): Tsuchiya, F., Y.Takahashi, K.Yamashita, T.Adachi, H.Ohya, H.Misawa, A.Morioka, Y.Miyoshi, K.Shiokawa, T.Kikuchi
  • Organizer: 2010 Asia-Pacific Radio Science Conference (AP-RASC'10)
  • Place of Presentation: Toyama, Japan
  • Year and Date: 2010-09-24
• [Presentation] Tweek Reflection Height Observed By Vlf Observation Network System In Southeast Asia (2010)
  • Author(s): Ohya, H., F.Tsuchiya, K.Yamashita, Y.Takahashi, T.Adachi
  • Organizer: 010 Asia-Pacific Radio Science Conference (AP-RASC'10)
  • Place of Presentation: Toyama, Japan
  • Year and Date: 2010-09-24
• [Presentation] Construction Of Asia Vlf Observation Network And Its Initial Results (2010)
  • Author(s): Yamashita, K., Y.Takahashi, F.Tsuchiya, H.Ohya, T.Adachi
  • Organizer: 2010 Asia-Pacific Radio Science Conference (AP-RASC'10)
  • Place of Presentation: Toyama, Japan
  • Year and Date: 2010-09-24
• [Presentation] Monitoring of lightning activity in Southeast Asia using VLF observation network (2010)
  • Author(s): Yamashita, K., Y.Takahashi, F.Tsuchiya, H.Ohya
  • Organizer: AOGS 2010
  • Place of Presentation: Hyderabad, India
  • Year and Date: 2010-07-05
• [Presentation] 2009年7月22日の皆既日食に伴う電離圏D領域観測 (2010)
  • Author(s): 土屋史紀、森岡昭、森岡昭、高橋幸弘、三好由純、菊池崇、塩川和夫、足立透、山下幸三、大矢浩代
  • Organizer: JPGU meeting
  • Place of Presentation: 幕張
  • Year and Date: 2010-05-23
• [Presentation] 2009年7月22日皆既日食時に観測されたtweek空電について (2010)
  • Author(s): 大矢浩代, 塩川和夫, 三好由純, 土屋史紀, 山下幸三, 高橋幸弘
  • Organizer: JPGU meeting
  • Place of Presentation: 幕張
  • Year and Date: 2010-05-23
• [Presentation] Statistical Analysis on Occurrence of Lighting Associated VLF/LF Events Observed in the East Asia (2010)
  • Author(s): Tsuchiya, F., et al.
  • Organizer: 2010 Asia-Pacific Radio Science Conference (AP-RASC'10)
  • Place of Presentation: Toyama
• [Presentation] 高緯度地域でのVLF/LF帯波動観測による放射線帯電子損失過程の実証的研究 (2010)
  • Author(s): 土屋史紀, 他
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 那覇
• [Presentation] LF帯標準電波を用いた7/22日食中のD領域変動観測 (2009)
  • Author(s): 土屋史紀, 森岡昭, 森岡昭, 三好由純, 高橋幸弘,菊池崇, 塩川和夫, 山下幸三, 大矢浩代, 足立透
  • Organizer: 平成21年度第1回STE現象報告会
  • Place of Presentation: 情報通信研究機構
  • Year and Date: 2009-09-04
• [Presentation] LF帯標準電波を用いた7/22日食中のD領域変動観測 (2009)
  • Author(s): 土屋史紀, 他9名
  • Organizer: 名古屋大学太陽地球環境研究所 STE現象報告会
  • Place of Presentation: 情報通信研究機構
  • Year and Date: 2009-09-04
• [Remarks] ホームページ等
  • URL: http://pparc.gp.tohoku.ac.jp/
• [Remarks]
  • URL: http://pparc.gp.tohoku.ac.jp/study/instrument/index.html
• [Remarks]
  • URL: http://pparc.geophys.tohoku.ac.jp/study/instrument/index.html