Evaluating spatio-temporal trends in infrasound propagation using seismo-acoustic arrivals from repeating explosions

We analyze seismo-acoustic arrivals originating from weekly controlled munition disposals at the McAlester Army Ammunitions Plant (McAAP) in Oklahoma over a period of seven months during 2019. These arrivals were recorded across a combination of 121 temporary and permanently installed seismic stations across Oklahoma and the surrounding states. Arrivals were identified by a human analyst team as well as an automated noise-adaptive STA/LTA detector. Because of its consistency and duration, the McAAP dataset provides an opportunity to study the spatial and temporal variability of infrasound propagation as it relates to seasonally variable atmospheric conditions. Here, we present findings based on both the empirical waveform data as well as infrasound propagation modeling through Ground to Space (G2S) atmospheric specifications utilizing acoustic ray-tracing. We evaluate the utility of using acoustic arrivals recorded on seismic stations to characterize infrasound propagation. We study the discrepancies and similarities between the seismo-acoustic arrivals and the predicted ray tracing arrivals with the intention of evaluating spatio-temporal trends related to atmospheric dynamics. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525