Moment Tensor Estimation and Uncertainty Quantification (MTUQ)
Description:
Accurately estimating seismic source parameters is crucial to understanding a wide range of geophysical phenomena, from natural seismic events to anthropogenic activities. Seismic moment tensors, together with point forces, can represent a variety of source mechanisms and be estimated using seismic data. Here, we present the latest developments in our open-source Moment Tensor and Uncertainty Quantification (MTUQ) code, tailored for point source characterization, with an emphasis on uncertainty estimation and visualization. We showcase the code's capabilities by revisiting the DPRK nuclear test of September 2017 to evaluate the influence of various data sources on the misfit space, both using a conventional grid-search approach and leveraging the fast Covariance Matrix Adaptation Evolution Strategy (CMA-ES) method. We also demonstrate point-force inversion capabilities on a recent rock and ice avalanche on the Barry Glacier. MTUQ takes advantage of high-performance computing architectures, accommodates a wide range of Green's function databases (both 1D and 3D and receiver side Strain Green's Function), and offers various optimization strategies that are adapted to different computational resource scenarios, from single-core CMA-ES optimization to large-scale grid searches with up to 1,000,000,000 grid points. We underscore the importance of accurate seismic source parameter estimation and the significant role MTUQ can play as a versatile and reliable tool in this essential aspect of seismology. New users can engage with active users and developers via workshop resources and research projects.
Session: Advancements in Forensic Seismology and Explosion Monitoring [Poster Session]
Type: Poster
Date: 5/2/2024
Presentation Time: 08:00 AM (local time)
Presenting Author: Julien
Student Presenter: No
Invited Presentation:
Authors
Julien Thurin Presenting Author Corresponding Author jthurin@alaska.edu University of Alaska Fairbanks |
Ryan Modrak rmodrak@lanl.gov Los Alamos National Laboratory |
Amanda McPherson ammcpherson@alaska.edu University of Alaska Fairbanks |
Félix Rodríguez-Cardozo felixr1@usf.edu University of South Florida |
Jochen Braunmiller jbraunmiller@usf.edu University of South Florida |
Liang Ding liangding86@gmail.com University of Toronto |
Qinya Liu liuqy@physics.utoronto.ca University of Toronto |
Carl Tape ctape@alaska.edu University of Alaska Fairbanks |
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Moment Tensor Estimation and Uncertainty Quantification (MTUQ)
Category
Advancements in Forensic Seismology and Explosion Monitoring