Constraining Slip Distribution of the Cascadia Subduction Zone Offshore Central Oregon with Seafloor Geodesy

用海底大地测量学约束俄勒冈州中部近海卡斯卡迪亚俯冲带的滑移分布

• 批准号: 1249876
• 负责人: C. David Chadwell
• 金额: $ 54.35万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-03-01 至 2018-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1249876&HistoricalAwards=false
• 关键词: Constraining; Slip; Distribution; Cascadia; Subduction

This proposal seeks to initiate geodetic measurements of plate motion in the Cascadia subduction zone. Three sites off the Oregon coast, one on the incoming plate to measure relative plate motion and two on the continental slope to measure motions related to fault motions and deformation will be monitored for horizontal displacement at the cm scale. These will be the first offshore monitors of upper-plate Cascadia motion and fault behavior. This work will lead to a better understanding of earthquake and tsunami risk in Cascadia. It implements a new autonomous approach to data collection. It places permanent benchmarks on the seafloor so that monitoring can continue into the indefinite future. Transponders will be recovered and reused and become part of instrument pool that can be used to extend these studies in the future

这项建议旨在对卡斯卡迪亚俯冲带的板块运动进行大地测量。将在俄勒冈州海岸外的三个地点监测厘米级的水平位移，一个地点位于传入板块上，以测量板块相对运动，两个地点位于大陆坡上，以测量与断层运动和变形有关的运动。这些将是第一个海上监测器的上板卡斯卡迪亚运动和故障的行为。这项工作将有助于更好地了解卡斯卡迪亚的地震和海啸风险。它采用了一种新的自主数据收集方法。它在海底设置了永久基准，以便监测可以持续到无限期的未来。应答器将被回收和重复使用，并成为仪器池的一部分，可用于在未来扩展这些研究