Utah FORGE: Seismic Velocity Models, February 2021

Description

This dataset contains a map, showing the Utah FORGE seismic stations, and seismic velocity model data. There are 61 1-D velocity models which are in a compressed TAR file. A paper is referenced at the end of this description which discusses the use of these data in 3D modelling. The paper summary follows: We expand the application of spatial autocorrelation (SPAC) from typical 1-D Vs profiles to quasi-3-D imaging via Bayesian Monte Carlo inversion (BMCI) using a dense nodal array (49 nodes) located at the Utah Frontier Observatory for Research in Geothermal Energy (FORGE) site. Combinations of 4 and 9 geophones in subarrays provide for 36 and 25 1-D Vs profiles, respectively. Profiles with error bars are determined by calculating coherency functions that fit observations in a frequency range of 0.2-5 Hz. Thus, a high-resolution quasi-3-D Vs model from the surface to 2.0 km depth is derived and shows that surface-parallel sedimentary strata deepen to the west, consistent with a 3-D seismic reflection survey. Moreover, the resulting Vs profile is consistent with a Vs profile derived from distributed acoustic sensing (DAS) data located in a borehole at the FORGE site. The quasi-3-D velocity model shows that the base of the basin dips ~22 degrees to the west and topography on the basement interface coincident with the Mag Lee Wash suggests that the bedrock interface is an unconformity. Reference: Zhang, H. and K. L. Pankow (2021). High-resolution Bayesian spatial auto-correlation (SPAC) pseudo-3D Vs model of Utah FORGE site with a dense geophone array, Geophys. Res. Int, https://doi.org/10.1093/gji/ggab049

Resources

Name Format Description Link
0 This file contains the longitude and latitude coordinates for the 61 1-D seismic velocity models https://gdr.openei.org/files/1294/Vs_nodes_coord.lst
34 This is a map of the Utah FORGE seismic monitoring stations. https://gdr.openei.org/files/1294/Screen%20Shot%202021-02-11%20at%203.20.40%20PM.png
45 This is a compressed tar file containing 61 1-D seismic velocity models. https://gdr.openei.org/files/1294/Vs_profiles.tar

Tags

  • seismic-noise
  • utah
  • pseudo-3d
  • geophysics
  • geospatial-data
  • distributed-acoustic-sensing
  • modeling
  • forge
  • egs
  • seismic-velocity
  • geophone
  • spatial-auto-correlation
  • utah-forge
  • spac
  • milford
  • sedimentary-basin
  • roosevelt-hot-springs
  • utah-geothermal
  • tar
  • bayesian-monte-carlo-inversion
  • model
  • 1d-seismic-velocity
  • waveform-inversion
  • seismic
  • velocity
  • seismic-data
  • velocity-models
  • geothermal
  • energy

Topics

Categories