Data Services Products: EMC-WUS256 A 3-D adjoint waveform tomography model for the western United States

Summary

WUS256 is a model of radially anisotropic crustal and upper mantle seismic structure of the western United States from adjoint waveform tomography.

Description

Name WUS256
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 2022
Data Revision r0.0 (revision history)
 
Short Description   WUS256 is a model of radially anisotropic crustal and upper mantle seismic structure of the western United States from adjoint waveform tomography. It is based on a multiscale inversion strategy with 8-stages and many iterations (256). WUS256 provides significantly improved waveform fits in the period band 20-120 seconds relative to the starting and several other models.
 
Authors: Arthur Rodgers, Lawrence Livermore National Laboratory, Livermore, CA, USA

Lion Krischer, Mondaic, Zurich, Switzerland

Michael Afanasiev, Mondaic, Zurich, Switzerland

Christian Boehm, Mondaic, Zurich, Switzerland

Claire Doody, University of California Berkeley, Berkeley Seismological Laboratory

Andrea Chiang, Lawrence Livermore National Laboratory, Livermore, CA, USA

Nathan Simmons, Lawrence Livermore National Laboratory, Livermore, CA, USA
 
Previous Model SPiRaL
Reference Model N/A
 
Model Download WUS256.r0.0.nc (see metadata) in netCDF 3 Classic format with 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)
 
Depth Coverage 0-400 km
 
Area Western United States (28°/52°, -132°/-100°)
 
Data Set Description WUS256 is based on inversion of over 94,000 waveforms from 72 earthquakes fit to the period band 20-120 seconds (Rodgers, 2022).
 
 

WUS256 model
WUS256 model showing 𝑣S (as perturbation to depth average, dlnvs) and 𝜉S at six depths indicated in each map: (a) 10; (b) 20; (c) 60; (d) 100, (e) 200; and (f) 300 km. Also shown are plate boundaries (red lines), state/provincial borders and physiographic regions.

Citations and DOIs

To cite the original work behind this Earth model:

  • 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
  • Rodgers, Arthur. (2022). Dataset for “WUS256: An Adjoint Waveform Tomography Model of the Crust and Upper Mantle of the Western United States for Improved Waveform Simulations” [Data set]. Zenodo. https://doi.org/10.5281/zenodo.6418105

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.2022.wus256.1

Credits

  • r0.0 model provided by Arthur Rodgers.

Revision History

revision r0.0: uploaded July 19, 2022.

Timeline

2022-08-03
online

Categories

19:17:43 v.d6084d45