MRI: Development of an Integrated Borehole Geodetic and Seismic Sensor

MRI：集成钻孔大地测量和地震传感器的开发

• 批准号: 1625069
• 负责人: Mark Zumberge
• 金额: $ 84万
• 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: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1625069&HistoricalAwards=false
• 关键词: MRI; Development; Integrated; Borehole; Geodetic

The Scripps Institution of Oceanography of the University of California San Diego will prototype a new generation of sensitive motion detector of the earth. The fiber-optic-based sensors are deployed in deep boreholes and record movements as small as the width of a human hair over times that range from a fraction of a second to years. The new instrument package will record behavior from sudden earthquakes to slow movements that do not generate seismic waves. The instrument can be located where dangerous faults or volcanic hazards exist near human populations, as well as where induced earthquakes associated with fluid extraction or injection might occur. This project is aligned with NSF's mission of promoting the progress of science to advance the nation's health, prosperity, and welfare. The Scripps Institution of Oceanography will develop a geodetic/seismometer package that can detect a range of earthquake-related phenomena from sudden slip to continuous slow slip and episodic tremor. The package will provide key data for understanding the physics of fault movement. The robust fiber-optic-based sensors will have a long instrument lifetime and be resistant to high downhole temperatures. The comprehensive instrument will measure vertical and horizontal ground velocities, gravity, tilt, and strain. The prototype instrument will be installed in an existing borehole at the Pinon Flat Observatory for testing and comparison with existing seismic and strain systems. The new package is expected to significantly expand the network of geodetic/seismic observations both on land and beneath the sea floor.

加州大学圣地亚哥分校斯克里普斯海洋学研究所将制作新一代灵敏的地球运动探测器原型。 基于光纤的传感器部署在深井中，记录小至人类头发宽度的运动，时间范围从几分之一秒到数年不等。 新的仪器包将记录从突发地震到不产生地震波的缓慢运动的行为。 该仪器可以安装在人口附近存在危险断层或火山灾害的地方，以及可能发生与流体抽取或注入相关的诱发地震的地方。该项目符合 NSF 促进科学进步以促进国家健康、繁荣和福利的使命。 斯克里普斯海洋学研究所将开发一个大地测量/地震仪包，可以检测一系列与地震相关的现象，从突然滑动到连续缓慢滑动和阵发性震颤。该软件包将为理解断层运动的物理原理提供关键数据。坚固的光纤传感器将具有较长的仪器使用寿命，并且能够耐受井下高温。 该综合仪器将测量垂直和水平地面速度、重力、倾斜和应变。该原型仪器将安装在 Pinon Flat 天文台的现有钻孔中，用于测试并与现有地震和应变系统进行比较。新的一揽子计划预计将显着扩大陆地和海底下的大地测量/地震观测网络。