Crustal deformation in and around the Hida mountain range revealed by space geodetic technologies

2017 Fiscal Year Final Research Report

• Project/Area Number: 26400454
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Hokkaido University (2015-2017); Kyoto University (2014)
• Principal Investigator: Takada Youichiro 北海道大学, 理学研究院, 准教授 (80466458)
• Co-Investigator(Kenkyū-buntansha): 鷺谷 威 名古屋大学, 減災連携研究センター, 教授 (50362299)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: InSAR / GNSS / 飛騨山脈 / 跡津川断層

Outline of Final Research Achievements

Combining GNSS surveys and InSAR time-series analyses, we obtained high spatial resolution images of inter-seismic velocity field in and around the Hida mountain range, especially for the Atotsugawa fault system. So far, InSAR has been applied to detect inter-seismic crustal deformation for arid regions and/or fault creeps along large scale active faults. In this study, we successfully applied InSAR analysis to humid areas covered with dense vegetation in summer and large amount of snow in winter. We revealed that, among three fault strands consisting of the Atotsugawa fault system, displacement gradient takes maximum in proximity of the Ushikubi fault. Through our work, it becomes possible to detect heterogeneous velocity field inside strain concentration zones.

Free Research Field

地形形成論