New mobile oceanic seismic recording system and its application in marine seismic exploration
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摘要: 本文介绍了一种面向全球海洋地震P波长期探测的新型潜标式海洋地震仪.该地震仪不同于传统的固定式陆地地震台站或者坐底式海底地震仪,而是漂浮在海水中一定深度接收天然地震信号,并随着洋流运动.当接收到地震P波信号后,该地震仪可以自动上浮至海面,并通过卫星将数据传回岸基中心,然后下沉到指定深度继续工作.该潜标式海洋地震仪主要由水听器模块、浮力调节模块、通信与传输模块、能源模块以及中央控制模块组成,同时有安全监测功能,以实现准实时、大范围的天然地震P波信号长期监测.该海洋地震仪将突破现有海洋地震观测技术局限,拓展海洋地震监测的时空覆盖范围及监测尺度,为海洋地震研究和地球深部构造提供准确可靠的数据.Abstract: We introduce a new Mobile Oceanic Seismic Recording System (MOSRS) for long-term P-wave recording. Compared to the traditional stationary Land Seismic Station or Ocean Bottom Seismometer, the MOSRS will float in the seawater with given depth and move along with ocean currents after deployment. When an earthquake occurs, the MOSRS will record the P-wave seismic data and rise to the sea surface automatically. After transferring the recorded seismic data to shore-based Satellite Receiving Stations, the MOSRS will submerge to given depth again and continue the P-wave seismic data recording. This MOSRS is a modular design system with five modules: the Hydrophone, the Buoyancy Control system, the Communication and Transfer system, the Energy system, and the Central Control system. A shore-based monitoring system is also designed. The MOSRS is able to record the long term P-wave seismic data from much wider regions in a near-real-time manner, which can break through the technical limits of recent marine seismic recording devices, and provide accurate and reliable seismic data for seismic tomography imaging of the deep structure.
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