Construction and Deployment of a Seafloor Interferometric Optical Fiber Strainmeter

海底干涉式光纤应变仪的构建和部署

• 批准号: 1235384
• 负责人: Mark Zumberge
• 金额: $ 65.41万
• 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: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1235384&HistoricalAwards=false
• 关键词: Construction; Deployment; Seafloor; Interferometric; Optical

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.

PI要求提供资金，以建议设计和测试一种新型的海底应变仪，其灵敏度将远远高于以前用于海底的应变仪。PI将传感器安装在海底，并通过观察固体地球应变潮汐（振幅约为50纳应变）来确定其本底噪声、响应和灵敏度。通过成功开发这一仪器，可以解决许多科学目标，包括慢地震（幕式震颤和滑动）、火山膨胀和收缩、中板应变信号、扩张中心事件和可能的海底滑动前兆。 拟议的装置有可能成为高质量海底观测站的标准仪器，从而能够进行真实的实时大地测量，并评估海底滑坡、断层和火山的危害。监测海洋地区的小构造应变将提供迄今无法获得的精确度的新数据。