Geodetic and geomorphic evaluations of earthquake potential of the northern Sumatran fault, Indonesia
Geodetic and geomorphic evaluations of earthquake potential of the northern Sumatran fault, Indonesia
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印度尼西亚苏门答腊北部断层地震潜力的大地测量和地貌评估
DOI：
10.1007/1345_2015_200
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Meliano. I.
中科院分区：
文献类型：
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作者：
Tabei;T.;Kimata;F.;Ito;T.;Gunawan;E.;Tsutsumi;H.;Ohta;Y.;Yamashina;T.;Soeda;Y.;Ismail;N.;Nurdin;I.;Sugiyanto;D.;Meliano. I.
我们在印度尼西亚苏门答腊岛最北部进行了大地测量和地貌观测，以监测苏门答腊岛北部断层附近的应变积累。由于该地区断层滑移率大、100多年来没有发生大地震以及最近由于2004年苏门答腊-安达曼地震（Mw9.2）导致断层库仑应力增加，因此对该地区地震发生潜力的评估非常紧迫。自 2005 年以来，我们为苏门答腊断层系统 (AGNeSS) 部署了亚齐 GPS 网络。收集的数据已用于估计苏门答腊断层的滑动/锁定分布，并构建了 2004 年事件后震后形变的综合模型。构造地貌特征对于揭示断层的长期滑动历史也很重要。我们利用高分辨率立体配对ALOS（先进陆地观测卫星）PRISM（全色立体测图遥感仪器）卫星图像绘制了苏门答腊断层的表面痕迹，并进行了现场观测，以确保痕迹的地貌和地质证据。我们介绍了断层测绘的初步结果，并简要描述了 GPS 检测到的地壳形变场。
We have conducted geodetic and geomorphic observations in the northernmost part of Sumatra, Indonesia to monitor strain accumulation in the vicinity of the northern Sumatran fault. Evaluation of the earthquake generation potential in this region is highly urgent because of a large fault slip rate, absence of major earthquakes for more than 100 years and recent Coulomb stress increase on the fault due to the 2004 Sumatra-Andaman earthquake (Mw9. 2). We have deployed Aceh GPS Network for the Sumatran Fault System (AGNeSS) since 2005. The data collected have been used for estimating slip/locking distribution of the Sumatran fault and constructing a comprehensive model for postseismic deformation after the 2004 event. Tectonic geomorphic features are also important to reveal long-term slip history of the fault. We have used high-resolution stereo-paired ALOS (Advanced Land Observing Satellite) PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping) satellite images to map the surface trace of the Sumatran fault and conducted field observations to ensure the trace by geomorphic and geologic evidence. We introduce preliminary results of the fault mapping together with a brief description of the crustal deformation field detected by GPS.