Sumatran Fault after the giant Sumatra earthquake - Temporal decay of postseismic deformation and initiation of a new strain accumulation process

2015 Fiscal Year Final Research Report

• Project/Area Number: 24403005
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Solid earth and planetary physics
• Research Institution: Kochi University
• Principal Investigator: TABEI Takao 高知大学, 教育研究部自然科学系理学部門, 教授 (40207220)
• Co-Investigator(Kenkyū-buntansha): KIMATA Fumiaki 公益財団法人地震予知総合研究振興会, 東濃地震科学研究所, 副主席研究員 (10089849) ; ITO Takeo 名古屋大学, 環境学研究科, 講師 (40377982) ; OHTA Yusaku 東北大学, 理学研究科, 准教授 (50451513) ; TSUTSUMI Hiroyuki 京都大学, 理学研究科, 准教授 (60284428)
• Research Collaborator: ISMAIL Nazli シアクアラ大学 ; NURDIN Irwandi シアクアラ大学 ; SUGIYANTO Didik シアクアラ大学 ; MEILANO Irwan バンドン工科大学 ; GUNAWAN Endra バンドン工科大学
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: スマトラ断層 / プレート境界 / GPS / 地殻変動 / インドネシア / 変動地形

Outline of Final Research Achievements

We have conducted continuous and intermittent GPS observations in Aceh province, northern Sumatra, Indonesia to monitor temporal decay of the postseismic deformation after the 2004 giant Sumatra earthquake. In addition we have carried out geodetic and geomorphic studies to evaluate earthquake generation potential of the Sumatran fault that is the arc-parallel strike-slip fault system in the overriding plate. GPS observations, interferometric analysis of synthetic aperture radar images, mapping of active faults from satellite stereo images, geomorphic field research, fault creep measurements, and trench excavation have been conducted to estimate slip pattern of the Sumatran fault in a wide range of time scale.

Free Research Field

測地学