Analysis of Digital Seismic Data from the Sumatran Fault and Toba Caldera

9315055麦卡弗里这项研究将通过分析自1990年10月以来一直在苏门答腊岛北部的苏门答腊岛断层和托巴火山口周围运行的数字地震仪网络的数据，继续对苏门答腊岛的地震学调查。将研究苏门答腊岛断裂上地震破坏的最大深度和深度分布，地震及其断层面解与地质构造的关系，断层和托巴火山口下的地震速度结构和衰减，以及俯冲板及其可能的撕裂与地表构造的关系。地震网在Rensselaer和Scripps运营的GPS大地网内运行，为研究地震活动和大地测量应变之间的空间和时间关系提供了机会。这项工作是与印度尼西亚气象和地球物理机构(雅加达)合作进行的，后者负责管理印度尼西亚的地震台网。这项研究是国家减少地震灾害计划的一部分。***

9315055 McCaffrey This research is to continue seismological investigations of Sumatra through analysis of data from a digital seismograph network that has been operating around the Sumatra fault and Toba caldera in northern Sumatra since October, 1990. The maximum depth and depth distribution of seismic failure on the Sumatra fault, the relation of the earthquakes and their fault plane solutions to geologic structures, the seismic velocity structure and attenuation beneath the fault and Toba caldera, and the relationship of the subducted slab and a possible tear within it to surface tectonics will be studied. The seismic network operates within a GPS geodetic network operated by Rensselaer and Scripps and provides the opportunity to study the spatial and temporal relations between seismic activity and geodetically measured strain. The work is being done in cooperation with the Indonesian Meteorological and Geophysical Agency (Jakarta) who operate the seismographic networks in Indonesia. This research is a component of the National Earthquake Hazard Reduction Program. ***