Seismological and Regional Uplift Field Investigations Following the M=8.2 Irian Jaya, Indonesia Earthquake of February 17, 1996

9633534纳布勒克1996年2月17日，印度尼西亚伊里安查亚西北海岸发生M8.2级大地震。初步报告显示，强烈震动和大海啸对沿海社区造成了广泛的破坏。这项研究与印度尼西亚科学家合作，将利用一个非同寻常的机会，利用先进的便携式地震仪器和天基大地测量学来研究这一事件造成的变形，包括在大俯冲地震期间测量同震滑动分布的难得机会。这也是研究平行逆冲断层和走滑断层相互作用的机会，这些断层在地震序列中表现为滑动分割性。根据过去的地震活动、新几内亚海沟的地震反射剖面和最近的大地测量，这部分俯冲断层被认为在很大程度上是不活跃的。这笔赠款将支持在逆冲断层的上壁上运行一个临时地震仪网络，以绘制断层与余震的地图，并通过测量同震海平面变化来测量沿海地区的静态隆起。重新占用以前赠款在该地区建立的大地GPS站点将在那里得到支持。这项研究是由探索性研究计划小额赠款资助的，是国家减少地震风险计划的一部分。

9633534 Nabelek On February 17, 1996, a great earthquake M=8.2 occurred along the northwestern coast of Irian Jaya, Indonesia. Initial reports show wide-spread destruction of the coastal communities resulting from strong shaking and a large tsunami. This research, in cooperation with Indonesian scientists, will take advantage of an extraordinary opportunity to use advanced prrtable seismic instrumentation and space-based geodesy to study the distortion due to the event, including a rare opportunity to measure co-seismic slip distribution during a great subduction earthquake. It is also and opportunity to study the interaction of parallel thrust and strike- slip faults that display slip partitioning during the earthquake sequence. This part of the subduction fault was considered to be largely inactive based on past seismicity, seismic reflection profiles of the New Guinea trench, and recent geodetic measurements. The grant will support operation of a temporary seismograph network on the hanging wall of the thrust to map the fault with aftershocks, and measurement of the static uplift of the coastal areas by measuring coseismic sea level changes. Reoccupation of the geodetic GPS site established in the area from previous grants will be supported there. This research is funded under the Small Grants for Exploratory Research Program and is a component of the National Earthquake Hazard Reduction Program.