RAPID: Collaborative Proposal: Response to the Searles Valley Earthquake Sequence

RAPID：协作提案：应对塞尔斯谷地震序列

• 批准号: 1945800
• 负责人: Amir Allam
• 金额: $ 1.5万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945800&HistoricalAwards=false
• 关键词: RAPID; Collaborative; Proposal; Response; Searles

This project will support rapid geologic, geodetic and seismological field investigations associated with the Searles Valley earthquake sequence in the Eastern California Shear Zone, which included a magnitude (M) 6.4 earthquake on July 4, 2019, and a subsequent M 7.1 event on July 5. The immediate field response is essential because the seismic and geodetic signals decay rapidly with time and geological evidence becomes obscure quickly. Rapid field studies should provide a wealth of data to facilitate understanding of the earthquake rupture properties and fault damage zones, 3D crustal structures around the ruptures, post seismic transients of geodetic fields, and effects of the events on the subsurface and human structures. This study should help clarify earthquake processes and structures in the highly active and complex Eastern California Shear Zone, which hosted three M 7 events in the last three decades, and contribute significantly to improved understanding of the tectonic deformation and seismic hazard in Southern California. The field studies and recorded data will provide valuable experience for students and early career scientists, and produce excellent material for education and outreach activities.This study will include obtaining differential lidar and optical image surveys, campaign Global Positioning System measurements, seismic deployments of across-fault linear and 2D arrays, and mapping effects of the ground motion on infrastructure. The obtained multi-disciplinary observations will enable researchers to address numerous outstanding questions about earthquake ruptures, spatio-temporal seismicity patterns, fault zone and crustal structures, intensity of ground shaking and postseismic deformation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将支持与东加州剪切带塞尔斯谷地震序列相关的快速地质、大地测量和地震学现场调查，其中包括 2019 年 7 月 4 日发生的 6.4 级地震，以及随后 7 月 5 日发生的 7.1 级地震。即时的现场响应至关重要，因为地震和大地测量信号随着时间的推移而迅速衰减，地质证据很快就会变得模糊。快速现场研究应提供大量数据，以促进了解地震破裂特性和断层损坏区域、破裂周围的 3D 地壳结构、大地测量场的震后瞬变以及事件对地下和人类结构的影响。这项研究应有助于阐明高度活跃且复杂的东加州剪切带的地震过程和结构，该剪切带在过去三十年中发生了三起 M 7 事件，并有助于提高对南加州构造变形和地震危险性的了解。 实地研究和记录的数据将为学生和早期职业科学家提供宝贵的经验，并为教育和外展活动提供优秀的材料。这项研究将包括获得差分激光雷达和光学图像调查、活动全球定位系统测量、跨地震部署断层线性和二维阵列，以及绘制地面运动对基础设施的影响。获得的多学科观测结果将使研究人员能够解决有关地震破裂、时空地震活动模式、断层带和地壳结构、地面震动强度和震后形变等众多突出问题。该奖项反映了 NSF 的法定使命，并被认为是值得的通过使用基金会的智力优势和更广泛的影响审查标准进行评估来提供支持。