Submarine Cable Deep-Ocean Observation of Mega-Thrust Earthquake and Tsunami with 44,000 100-m Spaced Sensors

2025/09/29 by Mazur, Mikael, Fontaine, Nicolas K., Ryf, Roland +13
#FOS: Physical sciences #Geophysics (physics.geo-ph)

paper · doi:10.48550/arxiv.2509.24813

Abstract

We detect the recent M8.8 mega-earthquake in Eastern Russia, on a 4400km long active telecom cable in the Pacific Ocean. The resolution achieved 100m represents the highest spatial resolution, the largest number of ocean-bottom sensors, and the first fiber-optic deep-ocean observation of a tsunami wave.

Citations

• Advanced Distributed Submarine Cable Monitoring and Environmental Sensing using Constant Power Probe Signals and Coherent Detection

Cited by

• Real-time processing of distributed acoustic sensing data for earthquake monitoring operations

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