Data Services Products: EMC-MESWA A 3-D adjoint waveform tomography model for the Middle East and Southwest Asia

Summary

A 3-D adjoint waveform tomography model for the Middle East and Southwest Asia

Description

Name MESWA
Title A 3-D adjoint waveform tomography model for the Middle East and Southwest Asia
Type 3-D Tomography Earth Model
Sub Type Full waveform model including wavespeed, density and attenuation
Year 2023
Data Revision r0.1 (revision history)
 
Short Description   MESWA is a model of radially anisotropic crustal and upper mantle seismic structure of the Middle East and Southwest Asia (MESWA) from adjoint waveform tomography. MESWA provides improved waveform fits in the period band 30-100 seconds relative to the starting and several other models (Rodgers, 2023a).
 
Authors: Arthur Rodgers: Lawrence Livermore National Laboratory, Livermore, CA, USA.
 
Previous Model SPiRaL (Simmons et al., 2021)
Reference Model N/A
 
Model Page None
 
Model Download MESWA.r0.1.nc is the model in netCDF 3 Classic format with the following parameters and units (see also metadata):
  • 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 to 400 km
 
Area Middle East and Southwest Asia (10°/50°, 24°/76°)
 
Data Set Description MESWA is based on inversion of over 35,000 broadband waveforms from 192 earthquakes and openly-available stations to fit to the period band 30-100 seconds (Rodgers, 2023).
 
 

MESWA
MESWA model showing isotropic shear wavespeed, 𝑣S (m/s), and anisotropy parameter, 𝜉S, at three depths indicated in each map: (top) 10; (middle) 60; (bottom) 125 km. Also shown are plate boundaries (white lines), state/provincial borders and Makran subducting slab depth (green).

Citations and DOIs

To cite the original work behind this Earth model:

  • A. J. Rodgers, L. Krischer, M. Afanasiev, C. Boehm, C. Doodyand N. Simmons (2024). Adjoint Waveform Tomography for Crustal and Upper Mantle Structure of the Middle East and Southwest Asia for Improved Waveform Simulations Using Openly Available Broadband Data. Bull. Seismo. Soc. Am. ; https://doi.org/10.1785/0120230248
  • Rodgers, A.J. (2023). Dataset for “MESWA: Seismic structure of the crust and upper mantle of the middle east and southwest asia from adjoint waveform tomography using openly available broadband data”. [Dataset]. Zenodo. https://zenodo.org/record/8212589

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.meswa.1


References

Credits

  • r0.0 model provided by Arthur Rodgers.

Revision History

r0.0: uploaded August 7, 2023.
r0.1: uploaded March 4, 2024. The revised model (r0.1) corrects an error with the latitude values. The original version (r0.0) provided values on a geocentric coordinate system, while this revision provides the model with regular geographic latitudes. The difference shifts the model northward by at most about 0.2 degree.

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