Analysis and Selective Resurvey of the Sumatra GPS Network

[9316889]博克PI和他的博士后助理将分析1992年和1993年在苏门答腊和印度尼西亚群岛其他岛屿上的GPS区域测量结果，以研究沿苏门答腊断层和西南弧前区域的地壳变形。GPS卫星星座、接收机技术和全球跟踪网络的不断改进，使得这两年对地表变形的估计比前三年的任何一年都要准确得多。这样可以定性和定量地评价沿该板块边缘的斜滑解耦为正常俯冲和剪切滑动。他们还将分析从1990年到1993年沿着五个断层样带收集的重复GPS测量数据。这些小规模线性阵列通过提供各个断层段近断层应变场的详细图像来补充区域网络。＊＊＊＊

9316889 Bock The PI and his postdoctoral associate will analyze their 1992 and 1993 GPS regional measurements from Sumatra and other islands in the Indonesian archipelago to study crustal deformation along the Sumatran fault and the forearc region to the southwest. Continuous improvements in GPS satellite constellation, receiver technology and global tracking networks permit significantly more accurate estimates of surface deformation for these two years than for any of the preceding three years. In this way, they can assess qualitatively and quantitatively the decoupling of oblique slip along this plate margin into normal subduction and shear slip. They will also analyze repeated GPS measurements collected from 1990 through 1993 along five fault transects. These small scale linear arrays complement the regional network by providing a detailed picture of the near-fault strain field at various fault segments. ****