Fundamental Research of hardware and software for Japan Electro-Magnetic Imaging with Network observation In-depth

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289347
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Earth system and resources engineering
• Research Institution: Kyoto University
• Principal Investigator: Goto Tada-nori 京都大学, 工学(系)研究科(研究院), 准教授 (90303685)
• Co-Investigator(Kenkyū-buntansha): 笠谷 貴史 国立研究開発法人海洋研究開発機構, その他部局等, 研究員 (90373456) ; 市原 寛 神戸大学, 海事科学研究科(研究院), 講師 (90553074) ; 三ヶ田 均 京都大学, 工学(系)研究科(研究院), 教授 (10239197) ; 武川 順一 京都大学, 工学(系)研究科(研究院), 助教 (70463304)
• Co-Investigator(Renkei-kenkyūsha): OSHIMAN Naoto 京都大学, 防災研究所, 教授 (70185255) ; YAMAGUCHI Satoru 大阪市立大学, 大学院理学研究科, 教授 (70191228)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 地球電磁気学 / 比抵抗構造 / 地震発生 / 火山噴火 / インバージョン / アレイ観測

Outline of Final Research Achievements

As fundamental research to elucidate the subsurface resistivity structure beneath Japan island arc system, we developed i) software for magnetotelluric analysis with removing noise such as equipment vibration, ii) software for imaging subsurface structure using land and marine electromagnetic data, iii) small-sized ocean bottom electromagnetometer. As a result, we succeeded in establishing data analysis technology using independent component analysis, completing forward and inversion codes of three-dimensional resistivty structure, which is faster and more accurately than the conventional method, and manufacturing small instruments. We obtained marine magnetotelluric data offshore NE Tohoku, and confirmed that the new hardwares and softwares are available for imaging subseafloor crust and the upper mantle.

Free Research Field

物理探査学