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.

为了快速应对 2010 年 2 月 27 日发生在智利的 8.8 级马乌莱地震，多个机构的调查人员在夏威夷大学的协调下，将安装 20 个连续的 GPS 站，利用滑移分布模型沿破裂长度定位站点，以广泛和大多数地有效地检测活动区域。实地工作将由俄亥俄州立大学的迈克·贝维斯 (Mike Bevis) 领导，并与智利大学的塞尔吉奥·巴里恩托斯 (Sergio Barrientos) 和智利地理军事研究所协调。数据将被纳入有限源滑动反演并公开发布。原始 GPS 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。 PI 列举了可以使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，检查应力载荷对主震和辅助断层的作用，观察后滑以及余震的时空分布，利用高速 GPS 并了解俯冲带和周边地区对地震的流变和力学行为。更广泛的影响包括对大型国际合作的支持，包括来自智利和法国机构的科学家，以及对来自夏威夷大学、俄亥俄州立大学、孟菲斯大学和加州理工学院的 PI 的支持。该项目将建立一个开放的档案，其中包含从该项目收集的 GPS 数据以及法国获得的数据。所有数据在通过 UNAVCO 收集后将立即公开。收集的数据将适用于广泛的领域，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 (GEO/EAR) 和国际科学与技术办公室的构造学和地球物理学项目支持。工程，美洲计划。