Long aseismic slip duration of the 2006 Java tsunami earthquake based on GPS data  

作　　者：Rio Raharja Endra Gunawan Irwan Meilano Hasanuddin Z.Abidin Joni Efendi 

机构地区：[1]Geodesy and Geomatics Engineering,Faculty of Earth Sciencesand Technology,Bandung Institute of Technology,Bandung,Indonesia [2]Graduate Research on Earthquake and Active Tectonics,Facultyof Earth Sciences and Technology,Bandung Institute ofTechnology,Bandung,Indonesia [3]Geospatial Information Agency of Indonesia,Cibinong,Indonesia

出　　处：《Earthquake Science》2016年第5期291-298,共8页地震学报（英文版）

基　　金：partially supported by the Australian Department of Foreign Affairs and Trade(DFAT)for Graduate Research on Earthquake and Active Tectonics at the Bandung Institute of Technology and Research Program of Bandung Institute of Technology No.FITB.PN-06-01-2016

摘　　要：The Java earthquake occurred on July 17, 2006 with magnitude 7.8 associated to the subduction process of Indo-Australian plate and Sundaland block off southwestern coast of Java. We present postseismic deformation parameters of the 2006 Java earthquake analyzed using campaign GPS observation from 2006 to 2008 and continuous observation from 2007 to 2014. We use an analytical approach of logarithmic and exponential functions to model these GPS data. We find that the decay time in the order of hundreds of days after the mainshock as observed by 8 years＇ data after the mainshock for magnitude 7 earthquake is longer than a general megathrust earthquake event. Our findings suggest that the 2006 Java earthquake which is considered as ＂tsunami earthquake＂ most probably occurred in the region that has low rigidity and tends to continuously slip for long time periods.The Java earthquake occurred on July 17, 2006 with magnitude 7.8 associated to the subduction process of Indo-Australian plate and Sundaland block off southwestern coast of Java. We present postseismic deformation parameters of the 2006 Java earthquake analyzed using campaign GPS observation from 2006 to 2008 and continuous observation from 2007 to 2014. We use an analytical approach of logarithmic and exponential functions to model these GPS data. We find that the decay time in the order of hundreds of days after the mainshock as observed by 8 years＇ data after the mainshock for magnitude 7 earthquake is longer than a general megathrust earthquake event. Our findings suggest that the 2006 Java earthquake which is considered as ＂tsunami earthquake＂ most probably occurred in the region that has low rigidity and tends to continuously slip for long time periods.

关 键 词：2006 Java earthquake Aseismic slip GPS Time series 

分 类 号：P315.7[天文地球—地震学]