Fiber optic has the key to anticipate earthquakes


Fiber optic has the key to anticipate earthquakes



Researchers achieve these cables in the detection of seismic movements


Fiber optic cables are the best earthquake detectors, according to the study by Philippe Jousset and Thomas Reinsch of the GFZ German Research Center for Geosciences published in Nature Communications.

In this study, the scientists sent pulses of laser light through an optical fiber, which was part of a 15-kilometer-long cable deployed in 1994, within the telecommunications network on the Reykjanes peninsula, southwest of Iceland.

This light signal was analyzed and compared with data sets from a dense network of seismographs, results that even surprised the researchers themselves. "Our measurements revealed structural characteristics in the subsoil with an unprecedented resolution and showed signals that equaled the data points every four meters," Philippe Jousset said in a statement.

Although the method is not new in other applications, the team is the first worldwide that carried out such measurements on the surface of the ground for seismological purposes and with such a long cable.

The advantages of the new method are enormous since there are innumerable fiber optic cables throughout the world in the dense telecommunications network.

Especially in large cities with high seismic risks, such as San Francisco, Mexico City, Tokyo or Istanbul, and many others

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