Underwater fiber-optic cables could moonlight as earthquake sensors

The seafloor cables that ferry internet traffic across oceans could be used to collect data

world map of submarine fiber-optic cables

MOTION OF THE OCEAN FLOOR  The network of submarine fiber-optic cables that deliver work e-mails and cat videos to computers around the world could double as undersea earthquake detectors. Existing cables are shown in purple; planned cables are in blue.

G. Marra et al/Science 2018

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