California Researchers Use Fiber-Optic Cables for Seismology
Cal Poly Humboldt researchers are repurposing internet cables to detect earthquake activity across California.
Updated on Oct. 15, 2026 in Geology
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Researchers at Cal Poly Humboldt are utilizing unused fiber-optic strands to monitor seismic activity in 2026. This system transforms existing broadband infrastructure into a network of continuous vibration sensors.
Why it matters
By turning fiber lines into line sensors, this project aims to enhance earthquake detection capabilities in active regions like Humboldt County. The study offers a new method to capture geophysical data that could support operational warning systems.
The project is now in its second year of evaluating how light-based signals can monitor thousands of miles of California internet infrastructure. Researchers use laser instruments to track vibrations across the entire length of these fiber-optic strands.
The players
Cal Poly Humboldt
This public university located in Northern California is leading the research effort to develop new earthquake monitoring technologies.
U.S. Geological Survey
This federal agency provides scientific data and expertise regarding natural hazards, including earthquake research and mapping.
Vero Networks
This private company collaborates on the project by providing access to fiber-optic infrastructure for scientific use.
The details
The team collaborates with the U.S. Geological Survey and Vero Networks to detect earthquake waves in areas near the San Andreas Fault and the Cascadia Subduction Zone. By treating cables as continuous sensors, the system provides broader seismic coverage than localized instruments.
Timeline
The research project began its first year in 2025.
The research project entered its second year in 2026.
The Big Picture
This research marks a paradigm shift by moving away from isolated seismic stations toward utilizing massive existing communication networks for geophysical monitoring. It follows a pattern of repurposing digital infrastructure to bridge gaps in current scientific data collection.
Successful implementation could lead to faster and more precise earthquake alerts for California residents by expanding the current sensing network. This technology could eventually provide critical early warning signals that save lives in regions prone to high seismic risk.
The takeaway
This innovative project demonstrates how existing infrastructure can be dual-purposed to improve public safety and scientific observation. Residents in earthquake-prone areas may benefit from more robust monitoring networks as these research methods scale.
Further reading
Learn more about local tectonic research and earth science advancements in California Geology.
Source note: This article includes information reported by Jefferson Public Radio.
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