Nathaniel Lindsay (Nathaniel Lindsey) from the University of California at Berkeley, with colleagues suggested to use the old submarine communication cables for the deployment of the monitoring network of seismic activity on the seabed.
According to an article published in the journal Science, the user of the program their specilaity prilagayut, in particular, where the use of traditional tools difficult.
Scientists have announced the successful experiment to use a 20 km section of the old cable in an underwater seismometer.
Special light pulses transmitted via optical fiber, allowed to detect even the smallest movements and vibrations of the cable, turning it into a distributed acoustic detector. The work was carried out at a depth of about 100 meters, but in the future the authors plan to try more serious dive.
Nevertheless, for those four days, during which we conducted observations near the coast of California, failed to register underwater earthquake of a magnitude of 3.5. A reflection of the generated wave from the bottom of the rocks indicated the existence of a previously unknown fault system. The authors note that today’s deep-sea seismic sensors – a rarity, whereas unused cables laying around.
Note, the history of underwater communication cables has more than a century. Today’s high performance fiber link all the continents except Antarctica.