New method for analyzing three-dimensional electrical conductivity structure

• Project/Area Number: 19740271
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: KOYAMA Takao The University of Tokyo, 地震研究所, 助教 (00359192)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,700,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥600,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥1,100,000 (Direct Cost: ¥1,100,000)
• Keywords: 観測手法 / 電磁探査法 / 比抵抗構造 / MT法 / galvanic distortion / phase tensor / MPT法 / インバージョン / Phase tensor

Research Abstract

We developed a new method to analyze the electrical conductivity structure without any effects of a galvanic distortion in which a tiny anomaly distorts the electric field and mislead us to totally different conductivity model.

Research Products

• [Presentation] Possibility of three-dimensional MT inversion by using MT phase tensor data (2009)
  • Author(s): Takao Koyama
  • Organizer: IAGA2009年総会
  • Place of Presentation: ハンガリー・ショプロン市
  • Year and Date: 2009-08-25
• [Presentation] Fast and memory-saved 3-D forward modeling code for MT by using integral equation method (2008)
  • Author(s): Koyama, T., H. Utada, and D . B. Avdeev
  • Organizer: The 19th International Workshop on EM Induction in the Earth
  • Place of Presentation: 中国・北京
  • Year and Date: 2008-10-24
• [Presentation] Three-dimensional inversion of resistivity structure for CSEM method and its application to the ACTIVE system in Izu-Oshima Island, Japan (2007)
  • Author(s): 小山崇夫
  • Organizer: IUGG 2007
  • Place of Presentation: イタリア・ペルージャ大学
  • Year and Date: 2007-07-09
• [Presentation] Hidefumi Watanabe and Tsuneomi Kagiyama., Three-dimensional inversion of resistivity structure for CSEM method and its application to the ACTIVE system in Izu-Oshima Island
  • Author(s): Takao Koyama, Yuji Takahashi, Hisashi Utada, Yuichi Morita
  • Organizer: IUGG2007総会
  • Place of Presentation: Japan
• [Presentation] Fast and memory-saved 3-D forward modeling code for MT by using integral equation method
  • Author(s): Takao Koyama, Hisashi Utada, Dmitry B. Avdeev
  • Organizer: Induction Workshop 2008
• [Presentation] Possibility of three-dimensional MT inversion by using MT phase tensor data
  • Author(s): Takao Koyama
  • Organizer: IAGA2009総会