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: 1945754
• 负责人: Viswanath Nandigam
• 金额: $ 2.6万
• 依托单位: University of California-San Diego
• 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 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945754&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.

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.快速现场研究应提供大量数据，以促进对地震破裂特性和断层损害区域，破裂周围的3D地壳结构，地震后地震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加利福尼亚剪切区的地震过程和结构，该剪切带在过去三十年中举办了三个M 7事件，并为改善了对南加州构造变形和地震危险的理解做出了重大贡献。 现场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出色的材料。本研究将包括获得差异激光雷达和光学图像调查，广告系列全球定位系统测量，跨配手线性和2D阵列的地震部署，以及对基础运动对基础运动的映射影响。获得的多学科观察将使研究人员能够解决有关地震破裂，时空地震性模式，断层区和地壳结构的众多杰出问题，地面震动和地震后变形的强度。该奖项反映了NSF的法定任务，并通过评估范围来反映出支持者的知识范围和宽广的基础。