GEOPRISMS Posdoctoral Fellowship: Systematic search and characterization of very low frequency earthquakes and offshore tremor in Cascadia using the Amphibious Array

GEOPRISMS 博士后奖学金：使用两栖阵列对卡斯卡迪亚极低频地震和近海地震进行系统搜索和表征

• 批准号: 1144695
• 负责人: Emily Brodsky
• 金额: $ 21.79万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-03-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1144695&HistoricalAwards=false
• 关键词: GEOPRISMS; Posdoctoral; Fellowship; Systematic; search

The study will undertake a systematic search for very low frequency earthquakes (VLFE), along the entire margin of Cascadia subduction zone, from the trench to the down-dip edge of the transition zone. The sources of VLFEs will be located and characterized to better understand the physics of fault slip, particularly at the edges of the locked zone. The study will better characterize the nature of seismic radiation and their spatiotemporal variability along the fault zone in the crust. It is also holed that it will improve our understanding of the full spectrum of the seismic radiation during slow slip episodes, physical mechanism governing slow earthquakes, and their relationship with regular seismicity. It may also shed light on the implications of the slow seismic activities on the nucleation of large damaging earthquakes. The study will form an early career research project for a new postdoc under the mentorsuip of the PI.Broader impacts include support of career development of a new young investigator. The study will examine the seismicity of a subduction zone that can potentially produce great damaging earthquakes. It reflects some of the major goals of the NSF-GeoPRISMS and the Cascadia Initiative, and makes good use of the Amphibious Array. Results from this study may help in planning focused interdisciplinary experiments, and guide the selection of target areas for future research.

该研究将沿着卡斯卡迪亚俯冲带的整个边缘，从海沟到过渡带的下倾边缘，对甚低频地震（VLFE）进行系统搜索。 VLFE 的来源将被定位和表征，以更好地了解断层滑移的物理原理，特别是在锁定区的边缘。该研究将更好地表征地震辐射的性质及其沿地壳断层带的时空变化。人们还认为，这将提高我们对慢滑动事件期间地震辐射的全谱、控制慢地震的物理机制及其与常规地震活动的关系的理解。它还可能揭示缓慢地震活动对大破坏性地震形成的影响。该研究将在 PI 的指导下为一名新的博士后形成一个早期职业研究项目。更广泛的影响包括支持新的年轻研究者的职业发展。这项研究将检查俯冲带的地震活动性，该俯冲带可能会产生破坏性极大的地震。它反映了 NSF-GeoPRISMS 和卡斯卡迪亚计划的一些主要目标，并充分利用了两栖阵列。这项研究的结果可能有助于规划有重点的跨学科实验，并指导未来研究目标领域的选择。