Fiber-optic cables can be repurposed into dense arrays of seismic sensors

Nature · Published 2 October 2026 Swipe more like this →

In short: Researchers have developed a way to turn existing fiber-optic cables into massive networks of sensitive strain sensors. By sending laser pulses through the cables and measuring light changes, this technology known as Distributed Acoustic Sensing can transform a single cable into a dense array of sensors spaced only meters apart.

This technique allows for high-resolution monitoring of earthquakes, volcanoes, and even ice sheets in locations that are otherwise too difficult or expensive to instrument with traditional seismometers. While the technology provides unprecedented spatial density over many kilometers, its full potential depends on improving community access to instruments and developing better digital infrastructure.

Why it matters: Fiber-optic cables can act as massive, high-resolution earthquake detectors in hard-to-reach places.

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