Journal
2020 22ND INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2020)
Volume -, Issue -, Pages -Publisher
IEEE
DOI: 10.1109/icton51198.2020.9203132
Keywords
Rayleigh scattering; optical time-domain reflectometry; underwater seismology; distributed sensing
Funding
- European Commission (EC) (H2020) through the FINESSE project [MSCA-ITN-ETN722509]
- Ministerio de Economia y Competitividad (MINECO) [TEC2015-71127-C2-2-R]
- Ministerio de Ciencia, Innovacion y Universidades (MICINN) [IJCI-2017-33 856, RTI20l8-097957-B-C31]
- Comunidad de Madrid (CM)
- FEDER program [SINFOTON2-CM: P2018/NMT-4326]
- University ofAlcala (FPI grant)
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We review our recent work on chirped-pulse distributed acoustic sensing (DAS) for the characterization of teleseismic and microseismic activity, particularly in submarine environments. We show that this tool may bring orders-of-magnitude more seismic data from the sea bottom, that could lead to a new understanding of the deep Earth's interior. We show the detection of an M8.2 earthquake occurred in the Fiji Islands in August 2018, using an ocean-bottom DAS array located >16000 km away from the earthquake. The acquired signals are compared with the spectrogram of a nearby broadband seismic station, showing major similar features between the two records. The results show the great potential of re-using already-deployed telecommunication fibre network for distributed teleseism monitoring.
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