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Title: Earthquake Magnitude With DAS: A Transferable Data–Based Scaling Relation

Journal Article · · Geophysical Research Letters
ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]
  1. California Institute of Technology (CalTech), Pasadena, CA (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  4. Univ. of Tokyo (Japan)

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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; State of California; National Science Foundation (NSF)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1974973
Report Number(s):
LA-UR-23-20408
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 10 Vol. 50; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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