Development research on new method for resistivity imaging using artificial electric noise caused by DC-railway leakage current

• Project/Area Number: 22740294
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Kyoto University
• Principal Investigator: YOSHIMURA Ryokei 京都大学, 防災研究所, 准教授 (50346061)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 観測手法 / 比抵抗構造

Research Abstract

In order to develop new method for underground resistivity imaging using artificial electric noise, which should be removed in ordinary electromagnetic surveys, caused by DC-railway leakage current, werevealed the characteristics of the DC-railway leakage currents by careful scrutiny of existingmultipoint and simultaneous observed electromagnetic data and clarified the issues in case of using leakage currents as active sources. In process of the careful scrutiny, weobtained three-dimensional resistivity image around the focal region of the 2007 Noto Hanto earthquake.

Research Products

• [Presentation] 比抵抗からみる内陸地震震源域周辺の不均質構造-2007 年能登半島地震を中心に (2013)
  • Author(s): 吉村 令慧・大志万 直人
  • Organizer: 京都大学防災研究所研究発表講演会
  • Place of Presentation: 京都
  • Year and Date: 2013-02-20
• [Presentation] Three-dimensional resistivity structure around the 2007 Noto Earthquake, Japan, and its relations to seismicity and slip distribution (2012)
  • Author(s): Ryokei Yoshimura, Naoto Oshiman, Hiroshi Ichihara, and Makoto Uyeshima
  • Organizer: 21st EM Induction Workshop
  • Place of Presentation: ダーウィン(オーストラリア)
  • Year and Date: 2012-07-30
• [Presentation] Three-dimensional electrical resistivity structure around the 2007 Noto Hanto Earthquake (2012)
  • Author(s): Ryokei Yoshimura, Naoto Oshiman, Hiroshi Ichihara, and Makoto Uyeshima
  • Organizer: JpGU Meeting
  • Place of Presentation: 千葉幕張
  • Year and Date: 2012-05-25
• [Presentation] Three-dimensional resistivity structure around the 2007 Noto Earthquake, Japan, and its relations to seismicity and slip distribution (2012)
  • Author(s): Yoshimura et al.
  • Organizer: 21st EM Induction Workshop
  • Place of Presentation: Darwin, Australia
• [Presentation] On the Heterogeneous Electrical Structure Around Earthquake Swarm Region (2011)
  • Author(s): R.Yoshimura, et al
  • Organizer: IUGG General Assembly
  • Place of Presentation: メルボルン(オーストラリア)
  • Year and Date: 2011-07-03
• [Presentation] Imaging Heterogeneous Electrical Resistivity Structures around the 2007 Noto Hanto Earthquake (2011)
  • Author(s): Ryokei Yoshimura, Naoto Oshiman, Hiroshi Ichihara, and Makoto Uyeshima
  • Organizer: the XXV IUGG General Assembly
  • Place of Presentation: メルボルン(オーストラリア)
  • Year and Date: 2011-07-02
• [Presentation] Imaging Heterogeneous Electrical Resistivity Structures Around the 2007 Noto Hanto Earthquake (2011)
  • Author(s): R.Yoshimura, et al
  • Organizer: IUGG General Assembly
  • Place of Presentation: メルボルン(オーストラリア)
  • Year and Date: 2011-07-02
• [Presentation] 稠密電磁気観測データによる長野県西部域の3次元比抵抗モデリング (2010)
  • Author(s): 吉村令慧, 他
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 千葉県幕張
  • Year and Date: 2010-05-26