OK-DGT-2021 (Chai et al., 2021) is a seismic velocity model that combines local body-wave travel times, surface-wave dispersions and gravity observations through a 3D simultaneous inversion to image the subsurface P- and S-wave velocity structure of the Oklahoma region. DGT stands for dispersion, gravity, and travel times.
|Title||3D seismic velocity model for Oklahoma|
|Type||3D Tomography Earth Model|
|Sub Type||Shear-wave velocity (km/s)|
|Data Revision||r0.0 (revision history)|
|Short Description||The OK-DGT-2021 seismic velocity model combines local body-wave travel times, surface-wave dispersions and gravity observations through a 3D simultaneous inversion to image the subsurface P- and S-wave velocity structure of the Oklahoma region. Data include 58,896 P-wave arrival times, 20,155 S-wave arrival times, 1995 Rayleigh- and Love-wave dispersion curves, and wavenumber filtered Bouguer gravity observations. Constrained by multiple geophysical observations, the velocity model is a reliable starting point for more detailed seismic investigations. Supplements to the original manuscript (available from AGU) include the original-formatted model and related visualizations.|
|Authors:||Chengping Chai, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
Andrew A. Delorey, Los Alamos National Laboratory, Los Alamos, NM, 97545, USA
Monica Maceira, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
Will Levandowski, TetraTech, Inc., Superior, CO, 80027, USA
Robert A. Guyer, Los Alamos National Laboratory, Los Alamos, NM, 97545, USA
Haijiang Zhang, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230052, China
David Coblentz, Los Alamos National Laboratory, Los Alamos, NM, 97545, USA
Paul A. Johnson, Los Alamos National Laboratory, Los Alamos, NM, 97545, USA
|Model Download||OK-DGT-2021.r0.0.nc (see metadata) is the OK-DGT-2021 model in netCDF 3 Classic format. The model is expressed as P- and S-wave velocities in km/s. Density (g/cm3) is also provided, which are inferred based on the empirical relationship between density and shear wave velocity (Maceira and Ammon, 2009).|
|Model Home Page||None|
|Depth Coverage||2 to 106 km|
|Area||Oklahoma region (latitude: 31˚/40.5˚, longitude: -103˚/-91˚)|
|Data Set Description||The dataset includes 58,896 P-wave arrival times, 20,155 S-wave arrival times, 1995 Rayleigh- and Love-wave dispersion curves from Herrmann et al., 2021, and wavenumber filtered Bouguer gravity observations (Balmino et al., 2012). The starting model was extracted from Chai et al. (2015).|
To cite the original work behind this Earth model:
- Chai, C., Delorey, A. A., Maceira, M., Levandowski, W., Guyer, R. A., Zhang, H., et al. (2021). A 3D Full Stress Tensor Model for Oklahoma. Journal of Geophysical Research: Solid Earth, 126(4), https://doi.org/10.1029/2020JB021113
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:
- Balmino, G., N. Vales, S. Bonvalot, and A. Briais (2012), Spherical harmonic modelling to ultra-high degree of Bouguer and isostatic anomalies, Journal of Geodesy, 86(7), 499–520, https://doi.org/
- Chai, C., C. J. Ammon, M. Maceira, and R. B. Herrmann (2015), Inverting interpolated receiver functions with surface wave dispersion and gravity: Application to the western U.S. and adjacent Canada and Mexico, Geophysical Research Letters, 42(11), 4359–4366, https://doi.org/
- Herrmann, R. B., Ammon, C. J., Benz, H. M., Aziz-Zanjani, A., & Boschelli, J. (2021). Short-period surface-wave tomography in the continental United States—a resource for research. Seismological Research Letters, 92(6), 3642–3656. https://doi.org/
- Maceira, M., & Ammon, C. J. (2009). Joint inversion of surface wave velocity and gravity observations and its application to central Asian basins shear velocity structure. Journal of Geophysical Research, 114(B2), B02314. https://doi.org/
- r0.0 model provided by • Chengping Chai.
revision r0.0: uploaded July 28, 2023.
- r0.0 online