Skip to Main content Skip to Navigation
Journal articles

Seismic monitoring in the oceans by autonomous floats

Abstract : Our understanding of the internal dynamics of the Earth is largely based on images of seismic velocity variations in the mantle obtained with global tomography. However, our ability to image the mantle is severely hampered by a lack of seismic data collected in marine areas. Here we report observations made under different noise conditions (in the Mediterranean Sea, the Indian and Pacific Oceans) by a submarine floating seismograph, and show that such floats are able to fill the oceanic data gap. Depending on the ambient noise level, the floats can record between 35 and 63% of distant earthquakes with a moment magnitude MZ6.5. Even magnitudes o6.0 can be successfully observed under favourable noise conditions. The serendipitous recording of an earthquake swarm near the Indian Ocean triple junction enabled us to establish a threshold magnitude between 2.7 and 3.4 for local earthquakes in the noisiest of the three environments.
Document type :
Journal articles
Complete list of metadatas

Cited literature [19 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01235776
Contributor : Adminhal Univbrestbu <>
Submitted on : Thursday, December 3, 2015 - 5:27:27 PM
Last modification on : Monday, October 12, 2020 - 11:10:22 AM
Long-term archiving on: : Friday, March 4, 2016 - 10:41:20 AM

File

naturecomms-sukhovich027.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Alexey Sukhovich, Sébastien Bonnieux, Yann Hello, Jean-Olivier Irisson, Frederik J. Simons, et al.. Seismic monitoring in the oceans by autonomous floats. Nature Communications, Nature Publishing Group, 2015, 6, pp.8027 ⟨10.1038/ncomms9027⟩. ⟨insu-01235776⟩

Share

Metrics

Record views

914

Files downloads

457