Teleseisms and Microseisms on an Ocean-Bottom Distributed Acoustic Sensing Array

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: This is version 4 of this Preprint.


Download Preprint


Ethan Williams, Maria R. Fernandez-Ruiz, Regina Magalhaes, Roel Vanthillo, Zhongwen Zhan, Miguel Gonzalez-Herraez, Hugo F. Martins


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 Mw8.2 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.



Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics



Published: 2019-05-30 07:39

Last Updated: 2019-12-20 15:35

Older Versions

CC BY Attribution 4.0 International

Add a Comment

You must log in to post a comment.


There are no comments or no comments have been made public for this article.