Upper Mantle P-Wave Velocity Structure from Passcal Teleseismic Transects Across Idaho, Wyoming and Colorado

Teleseismic P-Wave Tomogram of the Yellowstone Plume

[1] Inversion of a new data set of teleseismic P-wave travel-times from three PASSCAL seismic deployments around the Yellowstone hotspot reveals a 100 km diameter upper mantle plume that extends from the Yellowstone volcanic caldera to 500 km depth and dips 20 to the northwest. A monotonic decrease in the velocity perturbation of the plume from 3.2% at 100 km to 0.9% at 450 km is consistent wit...

Testing Five of the Simplest Upper Mantle Anisotropic Velocity Parameterizations Using Teleseismic S and Sks Data from the Billings, Montana Passcal Array

Global variation of body‐wave attenuation in the upper mantle from teleseismic P wave and S wave spectra

[1] We constrain the spatial variation of P‐wave (tP*) and S‐wave (tS*) attenuation by inverting 190,000 teleseismic P‐ and S‐wave spectra up to 0.8 Hz. These spectra are derived from 250 deep earthquakes recorded at 880 broadband global and regional network stations. The variance and ratios of tP* and tS* values are consistent with PREM’s upper mantle velocity and Q structures and conventional...

Mantle Heterogeneities and the SCEC Reference Three - Dimensional Seismic Velocity Model

We determine upper mantle seismic velocity heterogeneities below Southern California from the inversion of teleseismic travel-time residuals. Teleseismic P-wave arrival times are obtained from three temporary passive experiments and Southern California Seismic Network (SCSN) stations, producing good raypath coverage. The inversion is performed using a damped least-squares conjugate gradient met...

Seismic Structure of the Crust and Upper Mantle in the Southwestern United States Using Teleseismic Receiver Functions

This dissertation describes the development of receiver function processing methods to create images of the seismic structure of the crust and upper mantle from teleseismic earthquake arrivals. These methods include receiver function estimation and prestack migration techniques which reduce deconvolution instability and produce regularized, multi-phase receiver function images. The receiver fun...