RAPID proposal: Rapid seismic response to the July 2019 Mw 7.1 and 6.4 doublet near Ridgecrest, Southern California

RAPID 提案：对南加州里奇克莱斯特附近 2019 年 7 月 Mw 7.1 和 6.4 双峰的快速地震响应

• 批准号: 1941719
• 负责人: Abhijit Ghosh
• 金额: $ 7.49万
• 依托单位: University of California-Riverside
• 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=1941719&HistoricalAwards=false
• 关键词: RAPID; proposal; Rapid; seismic; response

This RAPID project is a seismic response to the two July 2019 Ridgecrest earthquakes in southern California. The earthquakes occurred close to the southern San Andreas fault and the Garlock fault. This is a heavily populated area that could sustain significant damage if earthquakes happened on those faults. While Ridgecrest is less populated, understanding these earthquakes can help us to better understand the seismic hazard more broadly in southern California, it can also help us to understand how large earthquake evolve and what physics governs these events. This experiment will rapidly deploy 20 seismic instruments around the earthquake ruptures. These additional stations will improve our ability to record aftershocks from the two mainshocks. The broader impacts of the project include support for students to be trained in scientific response to earthquakes and an improved understanding of seismic hazard in southern California. The data from this experiment will be made publicly available through the seismic data facility at IRIS.This deployment of 20 seismic stations around the epicenter of the Mw 7.1 and Mw6.4 Ridgecrest earthquakes will be used to determine the detailed fault structure, possible earthquake triggering, aftershock occurrence. The project will deploy a combination of short period and strong ground motion stations in collaboration with the USGS. Results may also inform high resolution seismic velocity structure, postseismic deformation and the evolution of stress in the region. Ultimately this may improve understanding of seismic potential on the Garlock and San Andreas faults which are in close proximity.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RAPID项目是对2019年7月加州南部里奇克雷斯特两次地震的地震响应。地震发生在圣安德烈亚斯断层和加洛克断层附近。这是一个人口稠密的地区，如果地震发生在这些断层上，可能会遭受重大破坏。虽然里奇克雷斯特人口较少，但了解这些地震可以帮助我们更好地了解加州南部更广泛的地震危险，它也可以帮助我们了解大地震是如何演变的，以及是什么物理学控制了这些事件。这项实验将在地震破裂周围迅速部署20台地震仪器。这些新增的观测站将提高我们记录两次主震后余震的能力。该项目更广泛的影响包括支持学生接受科学应对地震的培训，并提高对加州南部地震危险的认识。这次实验的数据将通过IRIS的地震数据设施向公众提供，在Mw7.1和Mw6.4里奇克雷斯特地震震中周围部署的20个地震台站将用于确定详细的断层结构、可能的地震触发、余震发生。该项目将与美国地质勘探局合作，部署短周期和强地面运动站的组合。研究结果还可为该区高分辨率地震速度结构、震后形变和应力演化提供信息。最终，这可能会提高对Garlock和San Andreas断层的地震潜力的理解，这些断层非常接近。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。