Data Services Products: EMC-MITPS_20 Vp, Vs, and Vp/Vs Ratio variations in the North American lithosphere from body wave travel times and surface wave dispersion

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.

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.
 
 

MITPS_20 velocity variations
Variations in (left column) Vp, (center column) Vs, and (right column) Vp/Vs from MITPS_20. Depths are (top row) 20 km, (center row) 60 km, (bottom row) 100 km. Geologic provinces are labeled as follows: Appalachian Mountains – A, Superior Province – SP, Mississippi Embayment – ME, Wyoming Craton – WY, Colorado Plateau – CP, Columbia Plateau – Col, Basin and Range – BNR. Red line is Grenville Front – GF.

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

Categories

03:35:38 v.b07c51d3