GEOPHYSICAL CHARACTERIZATION OF THE SOURCE PHYSICS EXPERIMENT SITE WITH THE LARGE-N SEISMIC ARRAY

CHEN, Ting, Los Alamos National Laboratory, Los Alamos, NM 87545, SNELSON, Catherine M., Los Alamos National Laboratory, Earth and Environment Sciences Division, PO Box 1663, MS F665, Los Alamos, NM 87545 and MELLORS, Robert, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94551, tchen@lanl.gov

The Source Physics Experiment (SPE) is a multi-institutional and multi-disciplinary project that consists of a series of chemical explosions at the Nevada National Security Site. The goal of SPE is to understand seismic wave generation and propagation from explosions. A detailed geophysical model of the SPE site is essential to achieve this goal. A Large-N seismic array that was deployed at the SPE site during the SPE-5 experiment (a 5000 kg TNT equivalent chemical explosion detonated in 2016) provides such an opportunity. The Large-N seismic array consists of 996 geophones (half three-component and half vertical-component sensors), and recorded 53 weight drops in addition to the SPE-5 explosion. This study uses Large-N array recordings to characterize local geophysical structure based on body wave and surface wave analysis. We found close correlation of geophysical parameters and geological structures. The results of this study will be incorporated into the large modeling and simulation efforts as ground-truth to validate the models.

Session No. 325

D51. Geophysics/Geodynamics Session

Wednesday, 25 October 2017: 1:30 PM-5:30 PM

Yakima 1 (The Conference Center)

Geological Society of America Abstracts with Programs. Vol. 49, No. 6
doi: 10.1130/abs/2017AM-301601

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GSA Annual Meeting in Seattle, Washington, USA - 2017

GEOPHYSICAL CHARACTERIZATION OF THE SOURCE PHYSICS EXPERIMENT SITE WITH THE LARGE-N SEISMIC ARRAY