期刊
SCIENCE
卷 361, 期 6401, 页码 486-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aat4458
关键词
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资金
- Department for Business, Energy, and Industrial Strategy (BEIS) as part of the UK National Measurement System program
- UK Space Agency
- Italian Minisfiy of EaLication, University and Research (MIUR) through the Progetti Prerniali 2014 and 2015 programs (LABMED and METGESP projects)
- Research, Innovation and Development Trust of the Universty of Malta
- Natural Environment Research Council (NERC)
- IRIS Data Services [EAR-1261681]
- NERC [bgs05003] Funding Source: UKRI
Detecting ocean-floor seismic activity is crucial for our understanding of the interior structure and dynamic behavior of Earth. However, 70% of the planet's surface is covered by water, and seismometer coverage is limited to a handful of permanent ocean bottom stations. We show that existing telecommunication optical fiber cables can detect seismic events when combined with state-of-the-art frequency metrology techniques by using the fiber itself as the sensing element. We detected earthquakes over terrestrial and submarine links with lengths ranging from 75 to 535 kilometers and a geographical distance from the earthquake's epicenter ranging from 25 to 18,500 kilometers. Implementing a global seismic network for real-time detection of underwater earthquakes requires applying the proposed technique to the existing extensive submarine optical fiber network.
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