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Title: Searching for hidden earthquakes in Southern California

Abstract

Earthquakes follow a well-known power-law size relation, with smaller events occurring much more often than larger events. Earthquake catalogs are thus dominated by small earthquakes, yet still missing a much larger number of even smaller events caused by signal fidelity issues. To overcome these limitations, we applied a template matching detection technique to the entire waveform archive of the regional seismic network in southern California. Furthermore this effort resulted in a catalog with 1.81 million earthquakes, a factor of 10 increase, which provides important new insights into the geometry of fault zones at depth, foreshock behavior and nucleation processes, and earthquake triggering mechanisms. The extraordinary detail resolved in this type of catalog will facilitate a new generation of analyses of earthquakes and faults.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]
  1. Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, USA.
  2. Geophysics Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
  3. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA.
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1547997
Alternate Identifier(s):
OSTI ID: 1511259
Report Number(s):
LA-UR-19-20273
Journal ID: ISSN 0036-8075; /sci/364/6442/767.atom
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 364 Journal Issue: 6442; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Earth Sciences

Citation Formats

Ross, Zachary E., Trugman, Daniel T., Hauksson, Egill, and Shearer, Peter M.. Searching for hidden earthquakes in Southern California. United States: N. p., 2019. Web. https://doi.org/10.1126/science.aaw6888.
Ross, Zachary E., Trugman, Daniel T., Hauksson, Egill, & Shearer, Peter M.. Searching for hidden earthquakes in Southern California. United States. https://doi.org/10.1126/science.aaw6888
Ross, Zachary E., Trugman, Daniel T., Hauksson, Egill, and Shearer, Peter M.. Thu . "Searching for hidden earthquakes in Southern California". United States. https://doi.org/10.1126/science.aaw6888.
@article{osti_1547997,
title = {Searching for hidden earthquakes in Southern California},
author = {Ross, Zachary E. and Trugman, Daniel T. and Hauksson, Egill and Shearer, Peter M.},
abstractNote = {Earthquakes follow a well-known power-law size relation, with smaller events occurring much more often than larger events. Earthquake catalogs are thus dominated by small earthquakes, yet still missing a much larger number of even smaller events caused by signal fidelity issues. To overcome these limitations, we applied a template matching detection technique to the entire waveform archive of the regional seismic network in southern California. Furthermore this effort resulted in a catalog with 1.81 million earthquakes, a factor of 10 increase, which provides important new insights into the geometry of fault zones at depth, foreshock behavior and nucleation processes, and earthquake triggering mechanisms. The extraordinary detail resolved in this type of catalog will facilitate a new generation of analyses of earthquakes and faults.},
doi = {10.1126/science.aaw6888},
journal = {Science},
number = 6442,
volume = 364,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1126/science.aaw6888

Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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    Works referencing / citing this record:

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