Strain accumulation in the Mentawai Forearc Sliver,Indonesia,inferred from continuous GNSS-derived strain rate  

作　　者：Leni Sophia Heliani Cecep Pratama Adi Wibowo David Prambudi Sahara Susilo Susilo Sidik Tri Wibowo Ayu Nur Safii Oktadi Prayoga Ajat Sudrajat Mizan Bustanul Fuady Bisri Evi Dwi Kurniasari Sheilla Evelinda Nicholas Genta Setiawan Gunawan 

机构地区：[1]Department of Geodetic Engineering,Universitas Gadjah Mada,Yogyakarta,Indonesia [2]Department of Computer Science,Universitas Diponegoro,Semarang,Indonesia [3]Global Geophysics Research Group,Institut Teknologi Bandung,Bandung,Indonesia [4]Research Center for Geological Disaster,National Research and Innovation Agency,Bandung,Indonesia [5]Geospatial Information Agency,Cibinong,Indonesia [6]Meteorological,Climatological,and Geophysical Agency,Jakarta,Indonesia [7]Graduate School of International Cooperation Studies,Kobe University,Japan [8]Graduate School of Geodetic Engineering,Universitas Gadjah Mada,Yogyakarta,Indonesia

出　　处：《Geodesy and Geodynamics》2025年第1期1-6,共6页大地测量与地球动力学(英文版)

基　　金：supported by Universitas Gadjah Mada through the 2022 Indonesian Collaborative Research Program.

摘　　要：The Mentawai Forearc Sliver(MFS)is characterized by oblique deformation formed as slip partitioned between normal and parallel trench plate convergence.The surge of great earthquakes from 2004 to2012 along the adjacent Sunda trench left a large unbroken segment known as the Mentawai Seismic Gap.Here,we adopted continuous Global Navigation Satellite System(GNSS)observation data to identify the present regional crustal deformation using geodetic strain rates.The principal strain rate,dilatation rate,and maximum shear strain rate are about 0.13 microstrain/yr,0.2 microstrain/yr,and 0.1 microstrain/yr,respectively,with the range of its uncertainties between 0.01 and 0.04 microstrain/yr.The dilatation and maximum shear strain rates reveal the spatial coverage of strike-slip duplex and backthrust tectonics along the Mentawai Forearc Sliver.

关 键 词：Mentawai FOREARC DILATATION SHEAR GEODETIC 

分 类 号：P228.4[天文地球—大地测量学与测量工程]