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Near-regional to Local Event Location Using Infrasound Arrival Times From Single Sensors

Description: 

Infrasound arrays have been traditionally used for acoustic event location due to their ability to accurately determine direction of arrival. Global networks of infrasound arrays reduce the need to incorporate single stations for large events; however, small events typically produce signals that are not observable at global distances. Accurate location efforts rely on observations across smaller regional or temporary deployments. While infrasound arrays are standard in acoustic event location, their large aperture and prohibitive costs limit the availability of arrays in regional or temporary deployments. A single infrasound sensor is comparatively easier and cheaper to deploy, making them the preferred choice for temporary deployments. In this study, we demonstrate the ability to accurately locate local and near-regional acoustic events using infrasound sensor arrival times and infrasound arrival times recorded on seismic stations, in a probabilistic location framework using simplistic forward models. We also produce a model uncertainty function for a simplistic infrasound travel time model that is consistent with a catalog of seismoacoustic events. Our results indicate that single-sensor infrasound arrival times can provide accurate estimates of event location in the absence of array-based observations. Furthermore, we combine infrasound and seismic observations to explore the benefit of seismoacoustic event location algorithms. Finally, we compare arrival-time based locations with amplitude-based location approaches.

Session: Detecting, Locating, Characterizing and Monitoring Non-earthquake Seismoacoustic Sources [Poster]

Type: Poster

Date: 4/19/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: Clinton Koch

Student Presenter: No

Invited Presentation: 

Authors