Capturing the Spatial Variation of Seismic Observations in SW4 Simulations of the Dry Alluvium Geology Experiment Series at the Nevada National Security Site
Description:
Improving predictive capabilities of seismic sources at varied distance and energy length scales is crucial to understanding whether or how the near-field geologic complexities influence seismic wavefield propagation. This presentation aims to illustrate simulation of ground motions induced in the Dry Alluvium Geology (DAG) experiment (Mission Support and Test Services, LLC, 2021) series in Yucca Flat to explore the effects of a diverse lithological composition and topographic features on the spatial variability of ground motion from chemical explosions. Numerous investigations in the past have utilized dense seismic arrays to explore the spatial variability of earthquake ground motion (SVEGM), highlighted by variations in amplitude and phase among recordings from the same earthquake at diverse locations within a specific region. One of the most significant large-scale experiments to identify the behavior of SVEGM was carried out on natural seismic sources in Lotung, Taiwan (Abrahamson, 1992). A similar large-scale study on anthropogenic seismic sources was carried out for events in the well characterized geology of Yucca Flat at the Nevada National Security Site during the DAG experiment. Simulation of the observed ground motions at DAG will be carried out in SW4, a finite difference numerical code developed for seismic wave propagation by Lawrence Livermore National Laboratory. Finally, the accuracy of the physics-based chemical explosion model will be presented by comparing the simulated ground motions with the recordings from the DAG site. The ultimate goal of a precise model is to identify gaps in the instrumentation scheme for future explosion experiments.
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: Swasti
Student Presenter: No
Invited Presentation:
Authors
Swasti Saxena Presenting Author Corresponding Author swasti9226@gmail.com Pacific Northwest National Laboratory |
James St. Clair james.stclair@pnnl.gov Pacific Northwest National Laboratory |
Parker Sprinkle parker.sprinkle@pnnl.gov Pacific Northwest National Laboratory |
Kirsten Chojnicki kirsten.chojnicki@pnnl.gov Pacific Northwest National Laboratory |
Hunter Knox hunter.knox@pnnl.gov Pacific Northwest National Laboratory |
Brian Schrom brian.schrom@pnnl.gov Pacific Northwest National Laboratory |
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Capturing the Spatial Variation of Seismic Observations in SW4 Simulations of the Dry Alluvium Geology Experiment Series at the Nevada National Security Site
Category
Advancements in Forensic Seismology and Explosion Monitoring