Estimation of postseismic deformation parameters from continuous GPS data in northern Sumatra after the 2004 Sumatra-Andaman earthquake

Bimar Anugrah; Irwan Meilano; Endra Gunawan; Joni Efendi

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Estimation of postseismic deformation parameters from continuous GPS data in northern Sumatra after the 2004 Sumatra-Andaman earthquake

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Continuous global positioning system(GPS) in northern Sumatra detected signal of the ongoing physical process of postseismic deformation after the M9.2 2004Sumatra-Andaman earthquake.We analyze the characteristics of postseismic deformation of the 2004 earthquake based on GPS networks operated by BIG,and the others named AGNeSS,and SuGAr networks located in northern Sumatra.We use a simple analytical logarithmic and exponential function to evaluate the postseismic deformation parameters of the 2004 earthquake.We find that GPS data in northern Sumatra during time periods of 2005-2012 are fit better using the logarithmic function with τlog of104.2±0.1 than using the exponential function.Our result clearly indicates that other physical mechanisms of postseismic deformation should be taken into account rather than a single physical mechanism of afterslip only.

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《地震学报：英文版》 |2015年第5期|347-352|共6页
作者
Bimar Anugrah; Irwan Meilano; Endra Gunawan; Joni Efendi;
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作者单位

Geodesy and Geomatics Engineering;

Faculty of Earth Science and Technology;

Bandung Institute of Technology;

Graduate Research on Earthquake and Active Tectonics;

Faculty of Earth Science and Technology;

Bandung Institute of Technology;

Geospatial Information Agency;

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原文格式 PDF
正文语种 chi
中图分类全球定位系统（GPS）;灵长目;
关键词
苏门答腊岛; GPS数据; 变形参数; 地震后; 估计; 全球定位系统; 物理机制; 对数函数;

Estimation of postseismic deformation parameters from continuous GPS data in northern Sumatra after the 2004 Sumatra-Andaman earthquake

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