Solving a seismic mystery with a diver’s camera: A case of shallow water T -waves in the Persian Gulf

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Authors

Amir Salaree, Zack J. Spica, Yihe Huang

Abstract

Sparse offshore coverage of seismic networks has hindered detailed studies of submarine earthquakes and their associated seismic hazard. We present results of our analysis of a diver’s recording of acoustic signals from an ML=5.6 earthquake in the Persian Gulf. We model the signals as a set of several shallow water T phases the frequency and group velocity of which are determined by bathymetry. We show that the audio track from this recording can provide reliable estimates of earthquake location and seismic moment. We also show that the reported shaking in the southern Persian Gulf, >170 km from the source of this small earthquake could result from T waves traveling through the entire width of the basin. Our results point to rudimentary and affordable underwater microphones similar to those used in the divers' cameras as tools to build efficient, low-cost networks for the study of offshore events and early warning.

DOI

https://doi.org/10.31223/X5108R

Subjects

Earth Sciences

Keywords

Seismo-acoustics, Persian Gulf, divers' microphones, seismic hazard, Early warning

Dates

Published: 2023-05-15 00:15

Last Updated: 2023-05-15 04:15

License

CC-BY Attribution-NonCommercial 4.0 International

Additional Metadata

Conflict of interest statement:
None