Peak Ground Velocity Spatial Variability Revealed by Dense Seismic Array in Southern California
Abstract
Abstract Understanding and modeling variability of ground motion is essential for building accurate and precise ground motion prediction equations, which can net site‐specific characterization and reduced hazard levels. Here, we explore the spatial variability in peak ground velocity (PGV) at Sage Brush Flats along the San Jacinto Fault in Southern California. We use data from a dense array (0.6 × 0.6 km 2 , 1,108 geophones, station spacings 10–30 m) deployed in 2014 for ~1 month. These data offer an opportunity to study small‐scale variability in this region. We examine 38 earthquakes (2 ≤ M L ≤ 4.2) within 200 km of the array. Fault strands and a small basin impact the ground motions, producing PGV variations up to 22% of the mean and a 40% reduction in P and S wave near‐surface velocities. We find along‐fault rupture directivity, source, and path effects can increase PGVs by 167%. Surface PGV measurements exceed the colocated borehole station (depth at 148 m) PGV by factors of 3–10, confirming the impact on PGV from near‐surface fault structures, basins, topography, and amplifications from soft sediments. Consistently, we find high PGVs within the basin structure. A pair of colocated GaM L 2.6 events produce repeatable PGV values with similar spatial patterns. The average corner frequenciesmore »
- Authors:
-
- Scripps Research Institute, San Diego, CA (United States)
- US Geological Survey, Moffett Field, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of Southern California, Los Angeles, CA (United States); Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1803023
- Alternate Identifier(s):
- OSTI ID: 1633941
- Grant/Contract Number:
- SC0016520; SC0016527; DE‐SC0016520; DE‐SC0016527
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Solid Earth
- Additional Journal Information:
- Journal Volume: 125; Journal Issue: 6; Journal ID: ISSN 2169-9313
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Geochemistry & Geophysics
Citation Formats
Johnson, Christopher W., Kilb, Debi, Baltay, Annemarie, and Vernon, Frank. Peak Ground Velocity Spatial Variability Revealed by Dense Seismic Array in Southern California. United States: N. p., 2020.
Web. doi:10.1029/2019jb019157.
Johnson, Christopher W., Kilb, Debi, Baltay, Annemarie, & Vernon, Frank. Peak Ground Velocity Spatial Variability Revealed by Dense Seismic Array in Southern California. United States. https://doi.org/10.1029/2019jb019157
Johnson, Christopher W., Kilb, Debi, Baltay, Annemarie, and Vernon, Frank. Mon .
"Peak Ground Velocity Spatial Variability Revealed by Dense Seismic Array in Southern California". United States. https://doi.org/10.1029/2019jb019157. https://www.osti.gov/servlets/purl/1803023.
@article{osti_1803023,
title = {Peak Ground Velocity Spatial Variability Revealed by Dense Seismic Array in Southern California},
author = {Johnson, Christopher W. and Kilb, Debi and Baltay, Annemarie and Vernon, Frank},
abstractNote = {Abstract Understanding and modeling variability of ground motion is essential for building accurate and precise ground motion prediction equations, which can net site‐specific characterization and reduced hazard levels. Here, we explore the spatial variability in peak ground velocity (PGV) at Sage Brush Flats along the San Jacinto Fault in Southern California. We use data from a dense array (0.6 × 0.6 km 2 , 1,108 geophones, station spacings 10–30 m) deployed in 2014 for ~1 month. These data offer an opportunity to study small‐scale variability in this region. We examine 38 earthquakes (2 ≤ M L ≤ 4.2) within 200 km of the array. Fault strands and a small basin impact the ground motions, producing PGV variations up to 22% of the mean and a 40% reduction in P and S wave near‐surface velocities. We find along‐fault rupture directivity, source, and path effects can increase PGVs by 167%. Surface PGV measurements exceed the colocated borehole station (depth at 148 m) PGV by factors of 3–10, confirming the impact on PGV from near‐surface fault structures, basins, topography, and amplifications from soft sediments. Consistently, we find high PGVs within the basin structure. A pair of colocated GaM L 2.6 events produce repeatable PGV values with similar spatial patterns. The average corner frequencies of these two events are 11–16 Hz, and viable measurements of stress drop can differ by 6.45 MPa. Within this small array, the PGV values are variable implying spatial extrapolation of PGV to regions of known faults and basins, even across a small area, should be done with caution.},
doi = {10.1029/2019jb019157},
journal = {Journal of Geophysical Research. Solid Earth},
number = 6,
volume = 125,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 2020},
month = {Mon Jun 01 00:00:00 EDT 2020}
}
Works referenced in this record:
What We Can and Cannot Learn about Earthquake Sources from the Spectra of Seismic Waves
journal, April 2001
- Beresnev, I. A.
- Bulletin of the Seismological Society of America, Vol. 91, Issue 2
Seismic wave attenuation in the crust
journal, October 1964
- Press, Frank
- Journal of Geophysical Research, Vol. 69, Issue 20
Tectonic stress and the spectra of seismic shear waves from earthquakes
journal, September 1970
- Brune, James N.
- Journal of Geophysical Research, Vol. 75, Issue 26
Ground Motion Prediction Equations in the San Jacinto Fault Zone: Significant Effects of Rupture Directivity and Fault Zone Amplification
journal, May 2014
- Kurzon, I.; Vernon, F. L.; Ben-Zion, Y.
- Pure and Applied Geophysics, Vol. 171, Issue 11
Repeatable Source, Site, and Path Effects on the Standard Deviation for Empirical Ground-Motion Prediction Models
journal, September 2011
- Lin, P. -S.; Chiou, B.; Abrahamson, N.
- Bulletin of the Seismological Society of America, Vol. 101, Issue 5
Triggering of earthquake aftershocks by dynamic stresses
journal, November 2000
- Kilb, Deborah; Gomberg, Joan; Bodin, Paul
- Nature, Vol. 408, Issue 6812
Focal spot imaging based on zero lag cross‐correlation amplitude fields: Application to dense array data at the San Jacinto fault zone
journal, November 2016
- Hillers, G.; Roux, P.; Campillo, M.
- Journal of Geophysical Research: Solid Earth, Vol. 121, Issue 11
Basic data features and results from a spatially dense seismic array on the San Jacinto fault zone
journal, May 2015
- Ben-Zion, Yehuda; Vernon, Frank L.; Ozakin, Yaman
- Geophysical Journal International, Vol. 202, Issue 1
A Nonergodic Ground‐Motion Model for California with Spatially Varying Coefficients
journal, October 2016
- Landwehr, Niels; Kuehn, Nicolas M.; Scheffer, Tobias
- Bulletin of the Seismological Society of America, Vol. 106, Issue 6
Frequency-Dependent Seismic Attenuation in the Eastern United States as Observed from the 2011 Central Virginia Earthquake and Aftershock Sequence
journal, January 2014
- McNamara, D. E.; Gee, L.; Benz, H. M.
- Bulletin of the Seismological Society of America, Vol. 104, Issue 1
Ground Motion Residuals, Path Effects, and Crustal Properties: A Pilot Study in Southern California
journal, June 2019
- Sahakian, V. J.; Baltay, A.; Hanks, T. C.
- Journal of Geophysical Research: Solid Earth, Vol. 124, Issue 6
Robust statistics for outlier detection
journal, January 2011
- Rousseeuw, Peter J.; Hubert, Mia
- WIREs Data Mining and Knowledge Discovery, Vol. 1, Issue 1
Short‐Term Hindcasts of Seismic Hazard in the Western Canada Sedimentary Basin Caused by Induced and Natural Earthquakes
journal, April 2019
- Ghofrani, Hadi; Atkinson, Gail M.; Schultz, Ryan
- Seismological Research Letters, Vol. 90, Issue 3
Stable Stress‐Drop Measurements and their Variability: Implications for Ground‐Motion Prediction
journal, February 2013
- Baltay, Annemarie S.; Hanks, Thomas C.; Beroza, Gregory C.
- Bulletin of the Seismological Society of America, Vol. 103, Issue 1
Scaling law between corner frequency and seismic moment of microearthquakes: Is the breakdown of the cube law a nature of earthquakes?: SCALING LAW OF MICROEARTHQUAKES
journal, April 2002
- Hiramatsu, Yoshihiro; Yamanaka, Hiroshi; Tadokoro, Keiichi
- Geophysical Research Letters, Vol. 29, Issue 8
Azimuthal Dependence of the Ground Motion Variability from Scenario Modeling of the 2014 Mw6.0 South Napa, California, Earthquake Using an Advanced Kinematic Source Model
journal, November 2016
- Gallovič, F.
- Pure and Applied Geophysics, Vol. 174, Issue 9
Stress drop estimates of potentially induced earthquakes in the Guy-Greenbrier sequence: STRESS DROPS OF INDUCED EARTHQUAKES
journal, September 2016
- Huang, Yihe; Beroza, Gregory C.; Ellsworth, William L.
- Journal of Geophysical Research: Solid Earth, Vol. 121, Issue 9
ObsPy: a bridge for seismology into the scientific Python ecosystem
journal, January 2015
- Krischer, Lion; Megies, Tobias; Barsch, Robert
- Computational Science & Discovery, Vol. 8, Issue 1
Free software helps map and display data
journal, January 1991
- Wessel, P.; Smith, W. H. F.
- Eos, Transactions American Geophysical Union, Vol. 72, Issue 41
Strong Ground Motion Prediction Using Virtual Earthquakes
journal, January 2014
- Denolle, M. A.; Dunham, E. M.; Prieto, G. A.
- Science, Vol. 343, Issue 6169
A VS30 Map for California with Geologic and Topographic Constraints
journal, September 2014
- Thompson, E. M.; Wald, D. J.; Worden, C. B.
- Bulletin of the Seismological Society of America, Vol. 104, Issue 5
The Variability of Ground-Motion Prediction Models and Its Components
journal, August 2010
- Atik, L. A.; Abrahamson, N.; Bommer, J. J.
- Seismological Research Letters, Vol. 81, Issue 5
Characteristics of Ground Motion Generated by Wind Interaction With Trees, Structures, and Other Surface Obstacles
journal, August 2019
- Johnson, Christopher W.; Meng, Haoran; Vernon, Frank
- Journal of Geophysical Research: Solid Earth
Persistent Noise Signal in the FairfieldNodal Three‐Component 5‐Hz Geophones
journal, July 2018
- Farrell, Jamie; Wu, Sin‐Mei; Ward, Kevin M.
- Seismological Research Letters, Vol. 89, Issue 5
Summary of the ASK14 Ground Motion Relation for Active Crustal Regions
journal, August 2014
- Abrahamson, Norman A.; Silva, Walter J.; Kamai, Ronnie
- Earthquake Spectra, Vol. 30, Issue 3
A Comparison of Spectral Parameter Kappa from Small and Moderate Earthquakes Using Southern California ANZA Seismic Network Data
journal, February 2012
- Kilb, D.; Biasi, G.; Anderson, J.
- Bulletin of the Seismological Society of America, Vol. 102, Issue 1
A rupture model of the 2011 off the Pacific coast of Tohoku Earthquake
journal, July 2011
- Ammon, Charles J.; Lay, Thorne; Kanamori, Hiroo
- Earth, Planets and Space, Vol. 63, Issue 7
Peak ground velocity from dense seismic array in southern California
dataset, January 2020
- Johnson, Christopher
- Mendeley
Internal structure of the San Jacinto fault zone in the trifurcation area southeast of Anza, California, from data of dense seismic arrays
journal, December 2017
- Qin, L.; Ben-Zion, Y.; Qiu, H.
- Geophysical Journal International, Vol. 213, Issue 1
Decomposing Leftovers: Event, Path, and Site Residuals for a Small‐Magnitude Anza Region GMPE
journal, July 2018
- Sahakian, Valerie; Baltay, Annemarie; Hanks, Tom
- Bulletin of the Seismological Society of America, Vol. 108, Issue 5A
Why Do Modern Probabilistic Seismic-Hazard Analyses Often Lead to Increased Hazard Estimates?
journal, December 2006
- Bommer, J. J.; Abrahamson, N. A.
- Bulletin of the Seismological Society of America, Vol. 96, Issue 6
Spatial Correlations in CyberShake Physics‐Based Ground‐Motion Simulations
journal, October 2019
- Chen, Yilin; Baker, Jack W.
- Bulletin of the Seismological Society of America, Vol. 109, Issue 6
Variability in earthquake stress drop and apparent stress: ENERGETIC AND ENERVATED EARTHQUAKES
journal, March 2011
- Baltay, Annemarie; Ide, Satoshi; Prieto, German
- Geophysical Research Letters, Vol. 38, Issue 6
Detection of small earthquakes with dense array data: example from the San Jacinto fault zone, southern California
journal, September 2017
- Meng, Haoran; Ben-Zion, Yehuda
- Geophysical Journal International, Vol. 212, Issue 1
Robust Stress Drop Estimates of Potentially Induced Earthquakes in Oklahoma: Evaluation of Empirical Green's Function
journal, June 2019
- Yoshimitsu, Nana; Ellsworth, William L.; Beroza, Gregory C.
- Journal of Geophysical Research: Solid Earth, Vol. 124, Issue 6
Matplotlib: A 2D Graphics Environment
journal, January 2007
- Hunter, John D.
- Computing in Science & Engineering, Vol. 9, Issue 3
Ground-Motion Observations of the 2014 South Napa Earthquake
journal, March 2015
- Baltay, A. S.; Boatwright, J.
- Seismological Research Letters, Vol. 86, Issue 2A
κ 0 and Broadband Site Spectra in Southern California from Source Model‐Constrained Inversion
journal, September 2019
- Klimasewski, Alexis; Sahakian, Valerie; Baltay, Annemarie
- Bulletin of the Seismological Society of America, Vol. 109, Issue 5
Selecting Empirical Green's Functions in Regions of Fault Complexity: A Study of Data from the San Jacinto Fault Zone, Southern California
journal, March 2013
- Kane, D. L.; Kilb, D. L.; Vernon, F. L.
- Bulletin of the Seismological Society of America, Vol. 103, Issue 2A
Shallow three-dimensional structure of the San Jacinto fault zone revealed from ambient noise imaging with a dense seismic array
journal, November 2018
- Mordret, Aurélien; Roux, Philippe; Boué, Pierre
- Geophysical Journal International, Vol. 216, Issue 2
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
- Share, Pieter-Ewald; Tábořík, Petr; Štěpančíková, Petra
- Geophysical Journal International, Vol. 222, Issue 2
Regional Correlations of VS30 and Velocities Averaged Over Depths Less Than and Greater Than 30 Meters
journal, December 2011
- Boore, D. M.; Thompson, E. M.; Cadet, H.
- Bulletin of the Seismological Society of America, Vol. 101, Issue 6
A Review on Scaling of Earthquake Source Spectra
journal, January 2019
- Wang, Jeen-Hwa
- Surveys in Geophysics, Vol. 40, Issue 2
On corner frequencies, attenuation, and low‐frequency earthquakes
journal, January 2017
- Bostock, M. G.; Thomas, A. M.; Rubin, A. M.
- Journal of Geophysical Research: Solid Earth, Vol. 122, Issue 1
Strong ground motion of the San Fernando, California, earthquake: Ground displacements
journal, February 1975
- Hanks, Thomas C.
- Bulletin of the Seismological Society of America, Vol. 65, Issue 1