Data Services Products: EMC-Alaska.JointInversion_RF+Vph+HV-1.Berg.2020 Shear Velocity Model of Alaska via Joint Inversion of Rayleigh Wave Ellipticity, Phase Velocities, and Receiver Functions across the Northern USArray

Summary

Alaska.JointInversion_RF+Vph+HV-1.Berg.2020 includes S-wave velocity structure across Alaska from joint inversion of ambient noise and earthquake tomography (phase velocity) and Rayleigh wave ellipticity; also includes data from receiver functions. Relations of Vp and density to Vs used to constrain Vp and Vs in Markov Chain Monte Carlo joint inversion. Final result from follow-up deterministic inversion.

Description

Name Alaska.JointInversion_RF+Vph+HV-1.Berg.2020
Title Shear Velocity Model of Alaska via Joint Inversion of Rayleigh Wave Ellipticity, Phase Velocities, and Receiver Functions across the Northern USArray
Type 3-D Tomography Earth Model
Sub Type Shear-wave velocity (km/s)
Year 2020
Short Description   This is a shear wave velocity model from joint inversion of receiver functions, Rayleigh ellipticity and phase velocity from ambient noise from ambient noise cross-correlations of Alaska Transportable Array and teleseismic events using seismic data from 2014-2019 (available through IRIS). Both final model (Vs, Vp, Density) (from follow-up deterministic inversion) and Markov Chain Monte Carlo model (used as starting model for deterministic inversion) are included. The reported MCMC model is created from Gaussian smoothing individual MCMC results at each station, as is the uncertainty (1 standard deviation of posterior distribution at each station). Vp and Rho in the MCMC model are determined from Vs. In the crust both Vp and density are determined from Brocher [2005] relations, and the mantle density is related from Vs via Hacker&Albers [2004] (density is scaled relative to 4.5km/s with 10 kg/m3 per 1% velocity change) and Vp/Vs ratio set to 1.789 (AK135; Shen & Ritzwoller, 2016).
Authors:  
Elizabeth M. Berg
Department of Geology & Geophysics
University of Utah
115 South 1460 East, Salt Lake City, UT 84112, USA

Fan-Chi Lin
Department of Geology & Geophysics
University of Utah
115 South 1460 East, Salt Lake City, UT 84112, USA

Amir Allam
Department of Geology & Geophysics
University of Utah
115 South 1460 East, Salt Lake City, UT 84113, USA

Vera Schulte-Pelkum
Cooperative Institute for Research in Environmental Sciences and Department of Geological Sciences
University of Colorado Boulder
216 UCB, Boulder, CO, USA

Kevin M. Ward
Department of Geology and Geological Engineering
South Dakota School of Mines and Technology
501 E. St. Joseph St., Rapid City, SD, USA

Weisen Shen
Department of Geosciences
Stony Brook University
255 Earth and Space Sciences Building (ESS)
Stony Brook, NY, USA
Previous Model None
Reference Model None
 
Model Download Alaska.JointInversion-RF+Vph+HV-1.Berg.2020-nc4.nc (see metadata ), is the netCDF file for the model
 
Model Homepage None
Depth Coverage 0 to 144.0 km (below earth surface)
Area Alaska (latitude 50°N/75°N, longitude: 120°W/180°W)
 
Data Set Description [Berg et al., (2020): https://doi.org/10.1029/2019JB018582] Dataset includes S-wave velocity structure across Alaska from joint inversion of ambient noise and earthquake tomography (phase velocity) and Rayleigh wave ellipticity; also includes data from receiver functions. Relations of Vp and density to Vs used to constrain Vp and density in Markov Chain Monte Carlo joint inversion. Final result from follow-up deterministic inversion.
 

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Citations and DOIs

To cite the original work behind this Earth model:

  • Berg, E. M., Lin, F.‐C., Allam, A., Schulte‐Pelkum, V., Ward, K. M., & Shen, W. ( 2020). Shear velocity model of Alaska via joint inversion of Rayleigh wave ellipticity, phase velocities, and receiver functions across the Alaska transportable Array. Journal of Geophysical Research: Solid Earth, 125, e2019JB018582. https://0120100299/https://doi.org/10.1029/2019JB018582

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:

References

  • Brocher, T. (2005). Empirical relations between elastic wavespeeds and density in the Earth’s crust. Bulletin of the Seismological Society of America, 95(6), 2081–2092. https://doi.org/10.1785/0120050077
  • Hacker, B. R., and G. A. Abers (2004), Subduction Factory 3: An Excel worksheet and macro for calculating the densities, seismic wave speeds, and H2O contents of minerals and rocks at pressure and temperature, Geochem. Geophys. Geosyst., 5, Q01005, https://doi.org/10.1029/2003GC000614.
  • Shen, W., & Ritzwoller, M. H. (2016). Crustal and uppermost mantle structure beneath the United States. Journal of Geophysical Research:
    Solid Earth, 121, 4306–4342.https://doi.org/10.1002/2016JB012887

Credits

Model provided by Elizabeth M. Berg

Timeline

2020-06-25
online

Categories

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