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Title: Lateral Variations Across the Southern San Andreas Fault Zone Revealed From Analysis of Traffic Signals at a Dense Seismic Array

Journal Article · · Geophysical Research Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. University of Southern California Los Angeles CA USA
  2. Southern University of Science and Technology Shenzhen China
  3. University of Southern California Los Angeles CA USA, Southern California Earthquake Center Los Angeles CA USA
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Abstract We image the shallow seismic structure across the Southern San Andreas Fault (SSAF) using signals from freight trains and trucks recorded by a dense nodal array, with a linear component perpendicular to SSAF and two 2D subarrays centered on the Banning Fault and Mission Creek Fault (MCF). Particle motion analysis in the frequency band 2–5 Hz shows that the examined traffic sources can be approximated as moving single‐ or multi‐point sources that primarily induce Rayleigh waves. Using several techniques, we resolve strong lateral variations of Rayleigh wave velocities and Q ‐values across the SSAF, including 35% velocity reduction across MCF toward the northeast and strong attenuation around the two fault strands. We further resolve 10% mass density reduction and 45% shear modulus decrease across the MCF. These findings suggest that the MCF is currently the main strand of the SSAF in the area with important implications for seismic hazard assessments.

Research Organization:
Univ. of Southern California, Los Angeles, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); Shenzhen Natural Science Foundation; USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0016520
OSTI ID:
1989418
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 14 Vol. 50; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

References (39)

Seismic fault zone trapped noise journal July 2014
Characterization of Fault Zones journal March 2003
Doppler effect in high-speed rail seismic wavefield and its application journal January 2022
Unified Structural Representation of the southern California crust and upper mantle journal April 2015
Distribution of seismic scatterers in the San Jacinto Fault Zone, southeast of Anza, California, based on passive matrix imaging journal January 2022
Seismic attenuation due to wave-induced flow: WAVE-INDUCED FLOW LOSSES journal January 2004
Collective behavior of earthquakes and faults: Continuum-discrete transitions, progressive evolutionary changes, and different dynamic regimes journal January 2008
High Temporal Resolution Monitoring of Small Variations in Crustal Strain by Dense Seismic Arrays journal January 2019
Three‐Dimensional Basin and Fault Structure From a Detailed Seismic Velocity Model of Coachella Valley, Southern California journal May 2019
Characteristics of Ground Motion Generated by Wind Interaction With Trees, Structures, and Other Surface Obstacles journal August 2019
Train Traffic as a Powerful Noise Source for Monitoring Active Faults With Seismic Interferometry journal August 2019
Seismic Imaging of the Mw 7.1 Ridgecrest Earthquake Rupture Zone From Data Recorded by Dense Linear Arrays journal July 2021
Monitoring Seismic Velocity Changes Across the San Jacinto Fault Using Train‐Generated Seismic Tremors journal September 2022
Seismic Attenuation Extraction From Traffic Signals Recorded by a Single Seismic Station journal February 2023
Daily and Seasonal Variations of Shallow Seismic Velocities in Southern California From Joint Analysis of H/V Ratios and Autocorrelations of Seismic Waveforms journal February 2023
Joint inversion of fault zone head waves and direct P arrivals for crustal structure near major faults journal February 1992
Geophysical and geological evidence for fracturing, water circulation and chemical alteration in granitic rocks adjacent to major strike-slip faults journal July 1984
Identification of natural and anthropogenic signals in controlled source seismic experiments journal February 2022
Characterizing the uppermost 100 m structure of the San Jacinto fault zone southeast of Anza, California, through joint analysis of geological, topographic, seismic and resistivity data journal May 2020
Internal structure of the San Jacinto fault zone at the Ramona Reservation, north of Anza, California, from dense array seismic data journal October 2020
Imaging shallow structures using interferometry of seismic body waves generated by train traffic journal December 2022
Seismic velocity structure in the Hot Springs and Trifurcation areas of the San Jacinto fault zone, California, from double-difference tomography journal June 2014
Basic data features and results from a spatially dense seismic array on the San Jacinto fault zone journal May 2015
Internal structure of the San Jacinto fault zone at Jackass Flat from data recorded by a dense linear array journal March 2017
Shallow three-dimensional structure of the San Jacinto fault zone revealed from ambient noise imaging with a dense seismic array journal November 2018
Imaging subsurface structures in the San Jacinto fault zone with high-frequency noise recorded by dense linear arrays journal February 2019
Detection of random noise and anatomy of continuous seismic waveforms in dense array data near Anza California journal July 2019
Quantitative analysis of seismic fault zone waves in the rupture zone of the 1992 Landers, California, earthquake: evidence for a shallow trapping structure journal December 2003
Imaging the deep structure of the San Andreas Fault south of Hollister with joint analysis of fault zone head and direct P arrivals journal June 2007
Diversity of fault zone damage and trapping structures in the Parkfield section of the San Andreas Fault from comprehensive analysis of near fault seismograms: Diversity of fault zone damage at Parkfield journal October 2010
A revised position for the primary strand of the Pleistocene-Holocene San Andreas fault in southern California journal March 2021
Empirical Relations between Elastic Wavespeeds and Density in the Earth's Crust journal December 2005
Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3)--The Time-Independent Model journal June 2014
Sources of Long‐Range Anthropogenic Noise in Southern California and Implications for Tectonic Tremor Detection journal October 2018
Equidistant Spectral Lines in Train Vibrations journal November 2017
Long‐Period Long‐Duration Events Detected by the IRIS Community Wavefield Demonstration Experiment in Oklahoma: Tremor or Train Signals? journal August 2018
Humming Trains in Seismology: An Opportune Source for Probing the Shallow Crust journal January 2021
Analysis of Seismic Signals Generated by Vehicle Traffic with Application to Derivation of Subsurface Q-Values journal February 2021
General Seismic Architecture of the Southern San Andreas Fault Zone around the Thousand Palms Oasis from a Large-N Nodal Array journal January 2022

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