A new approach to geophysical real-time measurements on a deep-sea floor using decommissioned submarine cables
A new approach to geophysical real-time measurements on a deep-sea floor using decommissioned submarine cables
复制标题
使用退役海底电缆进行深海海底地球物理实时测量的新方法
DOI：
10.1186/bf03352187
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Y. Shirasaki
中科院分区：
文献类型：
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作者：
J. Kasahara;Toshinori Sato;H. Momma;Y. Shirasaki
为了更好地了解地震的产生、板块边界的构造以及更好地描绘地球深部结构，需要在海洋中进行实时地球物理测量。因此，我们试图使用退役的海底电缆TPC-1和TPC-2。1997年，在伊豆-波宁海沟的向陆坡上，一个OBS成功地与TPC-1相连。1997年11月11日，海底地震仪在该站下方80公里深处探测到6.1级地震的同震和渐进变化。一个压力传感器共同记录了一个相当于50厘米海平面变化的变化。这表明，如果存在无声地震或地震前兆，探测到它们的可能性很大。自1995年以来，利用TPC-2开发了一个多学科的深海海底地球物理站。该站包括八套仪器：宽频地震仪、大地测量仪、水听器阵列、深海数码相机、CTD等。这些活动表明，退役的海底电缆可以成为在深海进行实时经济有效的地球物理测量的重要全球资源。
In order to better understand earthquake generation, tectonics at plate boundaries, and better image the Earth’s deep structures, real-time geophysical measurements in the ocean are required. We therefore attempted to use decommissioned submarine cables, TPC-1 and TPC-2. An OBS was successfully linked to the TPC-1 on the landward slope of the Izu-Bonin Trench in 1997. The OBS detected co-seismic and gradual changes during a Mw 6.1 earthquake just below the station at 80 km depth on November 11, 1997. A pressure sensor co-registered a change equivalent to 50 cm sea-level change. This suggests a high possibility detecting silent earthquakes or earthquake precursors if they exist.A multi-disciplinary geophysical station has been developed for deep-sea floor using TPC-2 since 1995. The station comprises eight instrument sets: broadband seismometers, geodetic measurements, hydrophone array, deep-sea digital camera, CTD, etc.These activities are examples that decommissioned submarine cables can be great global resources for real-time cost-effective geophysical measurements on a deep-sea floor.