Data Services Products: EMC-SoCal.ANT_Vph+Vgp.Qiu.2019 3D shear-wave velocity model of Southern California from joint inversion of Rayleigh wave phase and group velocities from ambient noise cross-correlations.

Summary

SoCal.ANT_Vph+Vgp.Qiu.2019, Qiu et al., (2019), is a shear wave velocity model from joint inversion of Rayleigh phase and group velocities from Eikonal tomography and ambient noise cross-correlations of Southern California using continuous seismic data from stations (available through the Southern California Earthquake Data Center and IRIS Data Center).

Description

Name SoCal.ANT_Vph+Vgp.Qiu.2019
Title 3D shear-wave velocity model of Southern California from joint inversion of Rayleigh wave phase and group velocities from ambient noise cross-correlations.
Type 3-D Tomography Earth Model
Sub Type Shear-wave velocity (km/s)
Year 2019
Short Description   This is a shear wave velocity model from joint inversion of Rayleigh phase and group velocity from Eikonal tomography and ambient noise cross-correlations of Southern California using continuous seismic data from stations (available through the Southern California Earthquake Data Center and IRIS Data Center).
Authors:  
Hongrui Qiu
Department of Earth Sciences
University of Southern California
3651 Trousdale Pkwy, Los Angeles, CA 90089, USA

Fan-Chi Lin
Department of Geology & Geophysics
University of Utah
115 South 1460 East, Salt Lake City, UT 84112, USA

Yehuda Ben-Zion
Department of Earth Sciences
University of Southern California
3651 Trousdale Pkwy
3651 Trousdale Pkwy, Los Angeles, CA 90089, USA
 
Previous Model None
Reference Model None
 
Model Download SoCal.ANT-Vph+Vgp.Qiu.2019.nc (see metadata ), is the netCDF file for the model
 
 
Model Homepage None
Depth Coverage 0 to 48.5 km (below earth surface)
Areal Coverage Southern California (latitude 32.2°N/36.2°N, longitude: 121°W/114°W)
 
Data Set Description [Qiu et al., (2019)] Dataset incluse S-wave velocity structure across Southern California from joint inversion of Rayleigh wave phase and group velocities from Eikonal tomography
 

Location map
Figure 1. Location map of 346 (299 three-component sensor in red) seismic
stations (triangles) used for imaging the Southern California (SC) plate boundary
region. Surface traces of large faults together with the state and national
boundaries are shown as black lines. Localities of the major faults and geologic
provinces in SC are labeled. Cross sections of the final inverted shear wave
velocities (Vs) are shown for the blue lines crossing San Andreas Fault at various
locations in Fig. 5.

final inverted Vs model
Figure 2. Left panels show map view of the final inverted Vs model at 3 km (top),
5 km (middle), and 7 km (bottom) depths. The Vs model within the black box (top
left panel) are displayed using a narrower color palette in Fig. 4. Model CVM-H15.1
is used as the initial model here, and the right panels illustrate the differences in Vs
between the final and initial Vs models at 3 km, 5 km, and 7 km depths.

final inverted Vs model
Figure 3. Same as Fig. 2 at depths of 10 km (top), 15 km (middle), and
20 km (bottom).

Zoom in of Vs maps for regions near SJF and SAF
Figure 4. Zoom in of Vs maps for regions near SJF and SAF (black box in left
top panel of Fig. 2) at depths 3 km (top left), 5 km (middle left), 7 km (bottom
left), 10 km (top right), 15 km (middle right), and 20 km (bottom right). The
white ellipses outline the major features (i.e. low velocity anomaly and velocity
contrast) that are more prominent in the final Vs model than the initial model.

Cross sections of the final inverted Vs model
Figure 5. Cross sections of the final inverted Vs model at locations indicated
as blue lines in Fig. 1. Localities of major faults, basins, and geomorphic
provinces are labeled on the top topography curve. The red dashed lines
beneath LA basin at profile CC’ denote a linear low velocity zone that is likely
associated with the Puente Hills blind-thrust system (Shaw et al., 2002). In
addition, a deep low velocity anomaly outlined by the black dashed circle at
profile DD’ may be related to the large damage volume estimated in Ben-Zion
and Zaliapin (2019). The black dashed lines at cross sections DD’, EE’, and FF’
denote the potential fault planes of SAF or SJF.

Citations and DOIs

To cite the original work behind this Earth model:

  • Qiu, H., Lin, F. C., & Ben‐Zion, Y. ( 2019). Eikonal tomography of the Southern California plate boundary region. Journal of Geophysical Research: Solid Earth, 124. https://doi.org/10.1029/2019JB017806

To cite IRIS DMC Data Products effort:

  • Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854, https://doi.org/10.1785/0220120032.

DOI for this EMC webpage:

References

A few of the most important references:

  • Allam, A. A., Ben-Zion, Y., Kurzon, I., & Vernon, F. (2014). Seismic velocity structure in the hot springs and trifurcation areas of the San Jacinto
    fault zone, California, from double-difference tomography. Geophysical Journal International, 198(2), 978–999. https://doi.org/10.1093/gji/ggu176
  • Berg, E. M., Lin, F.‐C., Allam, A., Qiu, H., Shen, W., & Ben‐Zion, Y. (2018). Tomography of Southern California via Bayesian joint inversion of Rayleigh wave ellipticity and phase velocity from ambient noise cross‐correlations. Journal of Geophysical Research: Solid Earth, 123, 9933–9949. https://doi.org/10.1029/2018JB016269
  • Lee, E. J., Chen, P., Jordan, T. H., Maechling, P. B., Denolle, M. A., & Beroza, G. C. (2014). Full-3-D tomography for crustal structure in southern California based on the scattering-integral and the adjoint-waveform methods. Journal of Geophysical Research: Solid Earth, 119, 6421–6451. https://doi.org/10.1002/2014JB011346
  • Tape, C., Liu, Q., Maggi, A., & Tromp, J. (2009). Adjoint tomography of the southern California crust. Science, 325(5943), 988–992. https://doi.org/10.1126/science.1175298
  • Tape, C., Liu, Q., Maggi, A., & Tromp, J. (2010). Seismic tomography of the southern California crust based on spectral-element and adjoint methods. Geophysical Journal International, 180(1), 433–462. https://doi.org/10.1111/j.1365-246X.2009.04429.x
  • Zigone, D., Ben-Zion, Y., Campillo, M., & Roux, P. (2015). Seismic tomography of the Southern California plate boundary region from noisebased Rayleigh and Love waves. Pure and Applied Geophysics, 172(5), 1007–1032. https://doi.org/10.1007/s00024-014-0872-1

Credits

Model provided by Hongrui Qiu

Categories

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