This study models the expected seafloor strain signals that would be recorded by Distributed Acoustic Sensing (DAS) from a passing tsunami. By simulating tsunami wave propagation and its interaction with the seafloor, we assess the potential of using existing telecom fiber optic cables for future tsunami early-warning systems, finding that the technology is sensitive enough to detect these critical signals.
This research explores the potential of using seafloor fiber optic cables with Distributed Acoustic Sensing (DAS) for tsunami early warning. We developed numerical models to simulate the strain that a tsunami wave would induce on a seafloor cable.
Our findings show that DAS is sensitive enough to detect these small deformations, providing a potential new method for real-time tsunami detection far from shore, which could significantly improve warning times.
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!Simulation of tsunami-induced strain on a seafloor cable