GPS Observations in Chile of Co-seismic and Post-seismic Deformation Associated with the 27 Feb, 2010 Mw 8.8 Maule, Chile Earthquake

智利 GPS 观测与 2010 年 2 月 27 日智利 Mw 8.8 Maule 地震相关的同震和震后变形

• 批准号: 1036065
• 负责人: Benjamin Brooks
• 金额: $ 20万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1036065&HistoricalAwards=false
• 关键词: GPS; Observations; Chile; Co; seismic

In rapid response to the Feb.27, 2010 M 8.8 Maule earthquake in Chile, investigators at multiple institutions, coordinated through the University of Hawaii will install 20 continuous GPS stations, siting stations along the rupture length by using slip distribution models to widely and most effectively instrument the active areas. Fieldwork will be lead by Mike Bevis, Ohio State University, coordinating with Sergio Barrientos at the University of Chile and the Instituto Geografico Militar de Chile. Data will be incorporated into finite-source slip inversions and publicly posted. The raw GPS data will also be made available either by manual download or in near real-time through satellite downlink. The intellectual merit of the project are wide ranging. The PIs cite tectonic problems that may be addressed using this broad array, including understanding the coseismic displacement field of the earthquake, which will help to constrain fault rupture and tsunami models, examining the role of stress loading on the mainshock and ancillary faults, observing afterslip and spatio-temporal distribution of aftershocks, using high-rate GPS and understanding the rheological and mechanical behavior of the subduction zone and surrounding region in response to the earthquake. The Broader Impacts include support for a large international collaboration including scientists from Chilean and French institutions, as well as support for PIs from the University of Hawaii, Ohio State, University of Memphis and Caltech. The project will produce an open archive of GPS data collected from this project as well as data acquired by the French. All data will be made openly available as soon as it is collected through UNAVCO. The data collected will be useful for a broad range of domains, including geodetic studies, structural engineering and oceanography.This award is supported by the Tectonics and Geophysics programs in the Division of Earth Sciences (GEO/EAR) and the Office of Interational Science and Engineering, Americas Program.

为了对2010年2月27日智利毛勒8.8级地震做出快速反应，多个机构的调查人员将通过夏威夷大学的协调，安装20个连续的GPS站，通过使用滑动分布模型沿破裂长度定位站，以广泛和最有效地测量活动区域。实地考察工作将由俄亥俄州立大学的Mike Bevis领导，与智利大学的Sergio Barrientos和智利地质米利塔尔研究所协调。数据将被合并到有限源滑动反演中并公开发布。原始的全球定位系统数据也将通过手动下载或通过卫星下行链路近乎实时地提供。该项目的智力价值是广泛的。PIS列举了可利用这一广泛的系列解决的构造问题，包括了解地震的同震位移场，这将有助于约束断层破裂和海啸模型，检查主震和附属断层上的应力载荷的作用，观察余震的余滑和时空分布，使用高速全球定位系统，以及了解俯冲带和周围地区对地震的流变和力学行为。更广泛的影响包括支持包括智利和法国机构的科学家在内的大型国际合作，以及支持夏威夷大学、俄亥俄州立大学、孟菲斯大学和加州理工大学的PI。该项目将为从该项目收集的全球定位系统数据以及法国人获得的数据建立一个开放档案。一旦通过联安援助团收集到所有数据，就将公开提供这些数据。收集的数据将用于广泛的领域，包括大地测量研究、结构工程和海洋学。该奖项由地球科学部的构造和地球物理计划(GEO/EAR)和国际科学与工程办公室美洲计划支持。