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arXiv · 2509.24813

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

Mikael Mazur·Nicolas K. Fontaine·Roland Ryf·Martin Karrenbach·Keith L. McLaughlin·Berry J. Sperry·Anuar G. Butler·Valey Kamalov·Lauren Dallachiesa·Ellsworth Burrows·David Winter·Haoshuo Chen·Jeewan Naik·Kishore Padmaraju·Ajay Mistry·David T. Neilson
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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.

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Mikael Mazur, Nicolas K. Fontaine, Roland Ryf, Martin Karrenbach, Keith L. McLaughlin, Berry J. Sperry, Anuar G. Butler, Valey Kamalov, Lauren Dallachiesa, Ellsworth Burrows, David Winter, Haoshuo Chen, Jeewan Naik, Kishore Padmaraju, Ajay Mistry, David T. Neilson. 2025-09-29. Submarine Cable Deep-Ocean Observation of Mega-Thrust Earthquake and Tsunami with 44,000 100-m Spaced Sensors. https://arxiv.org/abs/2509.24813

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