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Wednesday, March 03, 2021

Detecting Earthquakes and Waves

A favorite topic, detecting pattern.  Its a big part of our intelligence.   Here using new kinds of sensor data. 

Google Uses Underwater Fiber-Optic Cable to Detect Earthquakes   By New Scientist

A submarine fiber-optic cable owned by Google was used by researchers at the search engine giant and California Institute of Technology (Caltech) to detect earthquakes and ocean waves generated by storms.

The investigators measured changes in pressure and strain using traffic data from the 10,000-kilometer (6,213-mile)-long cable on the floor of the Pacific Ocean, recording about 30 ocean storm swell events and roughly 20 quakes exceeding magnitude 5 over nine months. Caltech's Zhongwen Zhan described this approach as more flexible and scalable than other attempts to deploy fiber-optic sensors, as new infrastructure is unnecessary.   Anthony Sladen at the University Côte d’Azur in France says the study constitutes “a major step in exploiting the benefits of existing cables.”

From New Scientist

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