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.
Quicklinks
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. | ||
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
