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](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/06/061318_MT_optical-fiber_feat.jpg?fit=860%2C460&ssl=1)
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