Data Services Products: EMC-WUS324 A 3-D adjoint waveform tomography model for the western United States

Summary

WUS324 is a model of radially anisotropic crustal and upper mantle seismic structure of the western United States from multiscale full waveform inversion tomography.

Description

Name WUS324
Title A 3-D adjoint waveform tomography model for the western United States
Type 3-D Tomography Earth Model
Sub Type Full waveform model including wave speed, density and attenuation
Year 2024
Data Revision r0.0 (revision history)
 
Short Description   WUS324 (Rodgers et al., 2024) is a model of radially anisotropic crustal and upper mantle seismic structure of the western United States from multiscale full waveform inversion tomography. It is based on 3 stages and 68 iterations beyond our previous model WUS256 (Rodgers et al., 2022) using a larger data set (Rodgers, 2024). WUS324 provides significantly improved waveform fits with minimum period of 16 seconds relative to the starting and several other models.
 
Authors: Arthur Rodgers, Lawrence Livermore National Laboratory, Livermore, CA, USA

Claire Doody, University of California Berkeley, Berkeley Seismological Laboratory

Andreas Fichtner, Department of Earth Sciences, Eidgenössische Technische Hochschule, Zürich, Switzerland

 
Reference Model N/A
 
Prior Model WUS256
 
Model Download WUS324.r0.0.nc (see metadata) is the model in netCDF 3 Classic format.
parameters (units):
  • VSV, vertically polarized shear wavespeed (km/s)
  • VSH, horizontally polarized shear wavespeed (km/s)
  • VSV, vertically polarized shear wavespeed (km/s)
  • VSH, horizontally polarized shear wavespeed (km/s)
  • QMU, attenuation quality factor for Lame parameter μ, mu (dimensionless)
  • QKAPPA, attenuation quality factor for Lame parameter κ, kappa (dimensionless)
  • RHO, density, ρ (kg/m3)
 
Model Home Page N/A
 
Depth Coverage 0-400 km
 
Area Western United States (28°/52°, -132°/-100°)
 
Data Set Description WUS324 is based on inversion of over 181,000 waveforms from 126 earthquakes fit with a minimum period of 16 seconds (Rodgers, 2024).
 

Visualization of WUS324
Visualization of WUS324’s isotropic shear wavespeed isosurfaces (> 4% as blue, <-4% as red) in the upper mantle with plate boundaries (red lines), geologic provinces (grey lines), hot spots (yellow spheres) and volcanic centers (red spheres). Also shown are US state and national boundaries.

Citations and DOIs

To cite the original work behind this Earth model:

  • Rodgers et al. (2024). Geophysical Research Letters under Review

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: https://doi.org/10.17611/dp/emc.2024.wus324.1

References:

  • A. Rodgers, L. Krischer, M. Afanasiev, C. Boehm, C. Doody, A. Chiang, N. Simmons (2022). WUS256: An Adjoint Waveform Tomography Model of the Crust and Upper Mantle of the Western United States for Improved Waveform Simulations, J. Geophys. Res., https://doi.org/10.1029/2022JB024549
  • A. J. Rodgers, C.D. Doody, and A. Fichtner (2024). WUS324: Multiscale Full Waveform Inversion Approaching Convergence Improves Waveform Fits While Imaging Seismic Structure of the Western United States, Geophys. Res. Lett.

Credits

  • r0.0 model provided by Arthur Rodgers.

Revision History

revision r0.0: uploaded October 16, 2024.

Timeline

2024-10-21
r0.0 online

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