Underwater seismology using submarine dark fibres
Abstract
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.
Additional Information
© 2020 IEEE. This work was supported by European Commission (EC) (H2020) through the FINESSE project, (MSCA-ITNETN722509); Ministerio de Economia y Competitividad (MINECO, project TEC2015-71127-C2-2-R); Ministerio de Ciencia, Innovacion y Universidades (MICINN) (IJCI-2017-33 856, RTI20l8-097957-B-C31); Comunidad de Madrid (CM) and FEDER program (SINFOTON2-CM: P2018/NMT-4326) and University of Alcala (FPI grant).Additional details
- Eprint ID
- 105576
- Resolver ID
- CaltechAUTHORS:20200928-070216280
- 722509
- European Research Council (ERC)
- TEC2015-71127-C2-2-R
- Ministerio de Economía, Industria y Competitividad (MINECO)
- IJCI-2017-33 856
- Ministerio de Ciencia e Innovación (MCINN)
- RTI20l8-097957-B-C31
- Ministerio de Ciencia e Innovación (MCINN)
- Comunidad de Madrid
- SINFOTON2-CM: P2018/NMT-4326
- Fondo Europeo de Desarrollo Regional (FEDER)
- University of Alcalá
- Created
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2020-09-28Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Seismological Laboratory, Division of Geological and Planetary Sciences