https://www.siliconvalley.com/2024/04/26/a-new-use-for-fiber-optic-lines-detecting-earthquakes/

Imagine repurposing underground fiber optic cables, typically used for delivering high-speed Internet to California residents, to detect and measure earthquakes.

That is the focus of a recent research by scientists at the California Institute of Technology led by Zhongwen Zhan, who presented his findings to students and community members during a lecture on Wednesday evening, April 24.