The Influence of 3D Velocity Models on Seismic Moment Tensor Estimation in Alaska
The EarthScope Transportable Array of seismic stations in Alaska and western Canada peaked in 2017 and has provided excellent data coverage in Alaska and western Canada, leading to a new generation of seismic velocity models, many of which are archived at the EarthScope IRIS EMC. We use five of these models to examine how 3D structures impact the estimation of moment tensors for a set of five representative Alaska earthquakes. We use the software package SPECFEM3D_Globe to generate Green’s function databases for each model, and then use the Python-based package MTUQ to perform moment tensor inversions. Using a set of goodness-of-fit metrics, we quantify the performance of each velocity model, as well as the differences among the estimated moment tensors. The testing will allow us to carefully choose the best starting model for a future adjoint tomography study in Alaska.
Session: Advances in Reliable Earthquake Source Parameter Estimation [Poster]
Type: Poster
Room: Exhibit Hall
Date: 4/16/2025
Presentation Time: 08:00 AM (local time)
Presenting Author: Amanda McPherson
Student Presenter: Yes
Invited Presentation:
Poster Number: 31
Additional Authors
Amanda McPherson Presenting Author Corresponding Author ammcpherson@alaska.edu University of Alaska Fairbanks |
Carl Tape ctape@alaska.edu University of Alaska Fairbanks |
Evans Onyango evans.onyango@us.af.mil University of Alaska Fairbanks |
Bryant Chow bhchow@alaska.edu University of Alaska Fairbanks |
Daniel Peter daniel.b.peter@gmail.com . |
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The Influence of 3D Velocity Models on Seismic Moment Tensor Estimation in Alaska
Category
Advances in Reliable Earthquake Source Parameter Estimation
Description