Summary
A velocity model for Vp, Vs, and Vp/Vs Ratio variations in the North American lithosphere from body wave travel times and surface wave dispersion.
Quicklinks
Description
| Name | MITPS_20 |
| Title | Vp, Vs, and Vp/Vs Ratio variations in the North American lithosphere from body wave travel times and surface wave dispersion |
| Type | 3-D Tomography Earth Model |
| Sub Type | Vp, Vs, and Vp/Vs ratio perturbations in % |
| Year | 2020 |
| Data Revision | r0.0 (revision history) |
| Short Description | Arrival times of teleseismic P, S, and Pn body waves were jointly inverted alongside Rayleigh wave phase velocities at periods of 5-290 s for variations in Vp and Vs. These variations were used to calculate Vp/Vs ratio perturbations. |
| Authors: | Eva M. Golos, Department of Geoscience, University of Wisconsin – Madison, Madison, WI, 53706 Hongjian Fang, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China Robert D. van der Hilst, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139 |
| Reference Model | Modified AK135 (netCDF file available below). Incorporates a monotonic Vp and Vs increase in crust, and Vp has been adjusted to provide a realistic Vp/Vs. |
| Model Download | MITPS-20.r0.0.nc (see metadata) in the Polar Stereographic Projection and in netCDF 3 Classic format. MITPS-20-reference.r0.0.nc (see metadata) in the Polar Stereographic Projection and in netCDF 3 Classic format. |
| Depth Coverage | 20–300 km |
| Area | the Contiguous United States and Southeastern Canada (latitude: 25.0˚ to 55.0˚N, longitude: -126.0˚ to -64.0˚E) |
| Data Set Description | Variations in Seismic Wave Speed and Vp/Vs Ratio in the North American Lithosphere. |
Citations and DOIs
To cite the original work behind this Earth model:
- Golos, E., Fang, H., & van der Hilst, R. D. (2020). Variations in seismic wave speed and VP/VS ratio in the North American lithosphere. Journal of Geophysical Research: Solid Earth, 125, e2020JB020574. https://doi.org/10.1029/2020JB020574
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.mitps20.1
Credits
- r0.0 model provided by Eva M. Golos.
Revision History
revision r0.0: uploaded October 3, 2022.
Timeline
- 2022-10-06
- online
