Earthquake Magnitude With DAS: A Transferable Data‐Based Scaling Relation
Abstract
Distributed Acoustic Sensing (DAS) is a promising technique to improve the rapid detection and characterization of earthquakes. Previous DAS studies mainly focus on the phase information but less on the amplitude information. In this study, we compile earthquake data from two DAS arrays in California, USA, and one submarine array in Sanriku, Japan. We develop a data-driven method to obtain the first scaling relation between DAS amplitude and earthquake magnitude. Our results reveal that the earthquake amplitudes recorded by DAS in different regions follow a similar scaling relation. The scaling relation can provide a rapid earthquake magnitude estimation and effectively avoid uncertainties caused by the conversion to ground motions. Our results show that the scaling relation appears transferable to new regions with calibrations. The scaling relation highlights the great potential of DAS in earthquake source characterization and early warning.
Additional Information
© 2023. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. The authors would like to thank Jessie Saunders and Egill Hauksson at the California Institute of Technology and Richard Allen at the University of California, Berkeley, for their helpful suggestions. The authors also appreciate the constructive comments, which greatly improved the manuscript, from Itzhak Lior and the other anonymous reviewer. This work was supported by the Office of Emergency Services, State of California, under MCG.CEEWS3-1-CALIFOES.NEWS, funding source award number 6113-2019. Y.M. is supported by NSF award EAR2022716. L.V. is supported by the Chick Keller Fellowship from the Center for Space and Earth Science (CSES) at Los Alamos National Laboratory (LANL). CSES is funded by LANL's Laboratory Directed Research and Development (LDRD) program under project number 20210528CR. This article has a Los Alamos National Laboratory (LANL) Unlimited Release Number (LA-UR-23-20408). Data Availability Statement. The measured peak strain rate amplitude from multiple DAS arrays is available from the Caltech DATA repository https://data.caltech.edu/records/sk6em-th949 with https://doi.org/10.22002/sk6em-th949. The Python scripts to process the data and reproduce results are available at https://github.com/yinjiuxun/das-strain-scaling.Attached Files
Supplemental Material - 2023gl103045-sup-0001-supporting_information_si-s01.pdf
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Additional details
- Eprint ID
- 121921
- Resolver ID
- CaltechAUTHORS:20230615-812866000.18
- 6113-2019
- California Office of Emergency Services
- EAR-2022716
- NSF
- 20210528CR
- Los Alamos National Laboratory
- Created
-
2023-06-22Created from EPrint's datestamp field
- Updated
-
2023-06-22Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences, Seismological Laboratory