Distributed fiber optic sensing of earthquakes and ocean-solid Earth interactions on seafloor telecommunication cables

A. Sladen, D. Rivet, J.P Ampuero, L. De Barros, Y. Hello, G. Calbris, P. Lamare

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Jun 12, 2019

Received Date: 22nd May 19

Two-thirds of the surface of our planet is covered by water and are still poorly instrumented, which has prevented the earth science community from addressing numerous key scientific questions. The potential to leverage the existing fibre optic seafloor telecom cables that criss-cross the oceans, by turning them into dense arrays of seismo-acoustic sensors, remains to be evaluated. Here, we report Distributed Acoustic Sensing measurements on a 41.5 km-long telecom cable that is deployed offshore Toulon, France. Our observations demonstrate the capability to monitor with unprecedented details the ocean-solid earth interactions from the coast to the abyssal plain, in addition to regional seismicity, such as a magnitude 1.9 micro-earthquake located 100 km away, with signal characteristics comparable to those of a coastal seismic station.

Read in full at EarthArXiv.

This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.

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Nature Communications

Nature Research, Springer Nature