Construction and Deployment of a Seafloor Interferometric Optical Fiber Strainmeter

PIs要求提供资金，以设计和测试一种新型的海底应变计，这种应变计的灵敏度将比以前用于海底的应变计高得多。pi将把传感器安装在海底，并通过观察固体地球应变潮汐（其振幅约为50纳米应变）来建立其噪声底、响应和灵敏度。通过成功开发该仪器，可以解决许多科学目标，包括缓慢地震（间歇性震颤和滑动），火山膨胀和收缩，中间板块应变信号，扩散中心事件和可能的海底滑动前兆。更广泛的影响：该装置有潜力成为高质量海底观测站的标准仪器，可以进行实时大地测量，并评估海底滑坡、断层和火山的危害。监测海洋地区的小型构造应变将提供迄今无法获得的精度的新数据。

The PIs request funding to propose to design and test a new type of seafloor strainmeter that will have sensitivity much higher than has been available previously for seafloor use. The PIs will install the sensor on the seafloor and establish its noise floor, response, and sensitivity by observing the solid Earth strain tides, which have an amplitude of approximately 50 nanostrain. Many scientific targets, including slow earthquakes (episodic tremor and slip), volcanic inflation and deflation, mid-plate strain signals, spreading center events, and possible seafloor slide precursors, can be addressed by successfully developing this instrument.Broader Impacts: The proposed device has the potential of becoming a standard instrument for a high-quality undersea observatory, allowing real time geodetic measurements and to assess hazards from undersea slides, faults, and volcanoes. Monitoring small tectonic strains in marine areas will provide new data with a precision so far unavailable.