S001-0005
Assessment of infrasound location capabilities using ground truth infrasonic events from the Utah Test and Training Range, Utah, USA

Monday, 7 December 2020
Poster
Fransiska K Dannemann Dugick1,2, Brian William Stump1, Philip S. Blom3, Chris Hayward4, Joshua Carmichael3, Stephen Arrowsmith1 and Omar E Marcillo5, (1)Southern Methodist University, Dallas, TX, United States, (2)Sandia National Laboratories, Albuquerque, NM, United States, (3)Los Alamos National Laboratory, Los Alamos, NM, United States, (4)Southern Methodist University, Roy Huffington Department of Earth Sciences, Dallas, TX, United States, (5)Department of Energy Oak Ridge, Oak Ridge, NM, United States
Abstract:
A series of near-surface explosive events from the Utah Test and Training Range are used to assess the location capability of a regional infrasonic network where stations are located between 84-410 km from the source. Ground truth origin time is refined utilizing a nearby seismic station while ground truth source location is known from blasting logs. Signal arrival times and backazimuth estimates were determined using an automatic F-statistic based signal detector and compared to estimates from an analyst waveform review. We apply a series of geographic location and season specific path-geometry models (PGMs) to better account for atmospheric propagation from source to receiver. We present results evaluating location estimates with and without high precision path-geometry models with the goal of assessing the effects of PGMs on location and origin time bias and uncertainty.
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