A new use for fiber optic lines: detecting earthquakes, Caltech researchers say

File photo: Visitors cross highway 178 next to a crack left on the road by an earthquake Sunday, July 7, 2019, near Ridgecrest, Calif. Imagine repurposing underground fiber optic cables, typically used for delivering high-speed Internet to California residents, to detect and measure earthquakes.

High school student seismology interns talk to people at their booth on the campus of Caltech in Pasadena on Wednesday, April 24, 2024. Zhongwen Zhan, professor of geophysics, has developed distributed acoustic sensing, a technique for detecting earthquakes with fiber optic cables, speaks during a lecture at Beckman Auditorium on the campus of Caltech in Pasadena on Wednesday, April 24, 2024.

People look at displays by the staff of Caltech’s Seismological Laboratory on the campus of Caltech in Pasadena on Wednesday, April 24, 2024.

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