Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-019-13262-7
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Funding
- NSF Graduate Research Fellowship
- Spanish Ministerio de Ciencia, Innovacion y Universidades (MICINN) [FJCI-2016-27881, IJCI-2017-33856]
- EU's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Action grant [722509EU]
- NSF CAREER Award [1848166]
- Spanish MINECO [TEC2015-71127-C2-2-R, RTI2018-097957-B-C31]
- [SINFOTON2-CM: P2018/NMT-4326]
- Directorate For Geosciences
- Division Of Earth Sciences [1848166] Funding Source: National Science Foundation
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Sparse seismic instrumentation in the oceans limits our understanding of deep Earth dynamics and submarine earthquakes. Distributed acoustic sensing (DAS), an emerging technology that converts optical fiber to seismic sensors, allows us to leverage pre-existing submarine telecommunication cables for seismic monitoring. Here we report observations of microseism, local surface gravity waves, and a teleseismic earthquake along a 4192-sensor ocean-bottom DAS array offshore Belgium. We observe in-situ how opposing groups of ocean surface gravity waves generate double-frequency seismic Scholte waves, as described by the Longuet-Higgins theory of microseism generation. We also extract P- and S-wave phases from the 2018-08-19 M(w)8.2 Fiji deep earthquake in the 0.01-1 Hz frequency band, though waveform fidelity is low at high frequencies. These results suggest significant potential of DAS in next-generation submarine seismic networks.
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