Data Services Products: EMC-NWUS11-S A 3-D S-wave tomography model for the northwestern United States

Summary

A 3-D S-wave tomography model for the northwestern United States, James et al. (2011) . The S-wave inversion is based on a total of 88,689 rays from 379 teleseismic events, with typical bandpass filter ranges of 0.04-0.15 Hz. The percent velocity perturbations reported by this model are insensitive to the starting 1-D reference model.

Description

Name NWUS11-S
Title A 3-D S-wave tomography model for the northwestern United States
Type 3-D Tomography Earth Model
Sub Type S velocity perturbation (%)
Year 2011
Short Description   NWUS11-S is based on the analysis of the relative arrival time of S-waves, obtained primarily from multi-channel cross correlation of recordings at USArray Transportable Array (TA) and the High Lava Plains seismic experiment (James et al. (2011) ).
Authors:  
David E. James
Department of Terrestrial Magnetism
Carnegie Institution of Washington
Washington, DC
Matthew J. Fouch
School of Earth and Space Exploration
Arizona State University
(now at Department of Terrestrial Magnetism, Carnegie Institution of Washington)
Tempe, Arizona
Richard W. Carlson
Department of Terrestrial Magnetism
Carnegie Institution of Washington
Washington, DC
Jeffrey B. Roth
ExxonMobil Exploration Company
Houston, TX
Previous Model
Reference Model N/A
Model Download
NWUS11-S model in its original format as a compressed text file (NWUS11-S.txt.gz ) that includes the model values from each node of the S-wave model for depths of good resolution (50 km to 1200 km depth). Note that the nodes grow larger toward the lateral edges and the bottom of the model (see text for details). The order of columns is: Depth(km) Latitude(deg N) Longitude(deg W) %velocity_perturbation. A value of “999.00000” signifies a node with a low hit count and is thus considered very poorly constrained.
 
NWUS11-S_percent.nc (metadata ), is the netCDF binary for the above model.
Model Homepage
Depth Coverage 50 to 1200 km
Areal Coverage Northwestern United States (32°/54°, -130°/-104°)
 
Data Set Description [ James et al. (2011) ] The S-wave inversion is based on a total of 88,689 rays from 379 teleseismic events, with typical bandpass filter ranges of 0.04-0.15 Hz.

model NWUS11-S S velocity perturbations at 6 depths

Figure, James et al. (2011) , shows model NWUS11-S S velocity perturbations at 6 depths.

Citation

  • James D.E., M.J. Fouch, R.W. Carlson and J.B. Roth. 2011. “Slab fragmentation, edge flow and the origin of the Yellowstone hotspot track.” Earth Planet. Sci. Lett., doi:10.1016/j.epsl.2011.09.007.
  • 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 application, Seismological Research Letters, 83(6), 846:854. doi: 10.1785/0220 120032

Credits

  • D.E. James, M.J. Fouch, R.W. Carlson and J.B. Roth

DOI

doi:10.1016/j.epsl.2011.09.007

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