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Seismoacoustic Monitoring of Explosive Sources on the Korean Peninsula

Description: 

Seismoacoustic signals propagating through the Earth and the atmosphere provide critical information for detecting, locating, and characterizing natural and anthropogenic sources, as well as for understanding wave propagation in coupled seismic and acoustic wavefields. In this study, we analyze seismoacoustic signals recorded at seismic and infrasound arrays, jointly operated by Southern Methodist University and the Korea Institute of Geoscience and Mineral Resources. Additional data include recordings from the KSRS seismic array of the Comprehensive Test Ban Treaty Organization and available regional seismic networks in and around the Korean Peninsula. We initiated the compilation of a seismoacoustic event catalogue for July–December 2025. Seismic events were identified using real-time SeisComP processing, and each event was associated with infrasound detections characterized by arrival time and azimuth from infrasound arrays using the automatic Adaptive F-Detector. Approximately 16% of detected seismic events are accompanied by infrasound signals, most of which originate from inland mining and quarry activities. In addition, we conducted a seismoacoustic wavefield experiment during the summer of 2024 at a limestone quarry in Yeongwol, a known infrasound hotspot. The experiment involved deploying Chaparral infrasound sensors, EpiSensor accelerometers, and Sapphire mini-infrasound sensors, installed both on the ground and on a drone. Seismoacoustic signals generated by three blasts were successfully recorded across a dense sensor network at local distances. This unique dataset enables detailed investigation of short-range seismoacoustic signal observations and propagation. Overall, this study provides valuable insights into the physical processes governing coupled seismic-to-acoustic wavefields and contributes to improved methodologies for explosion monitoring.

Session: Data-Driven and Computational Characterization of Non-Earthquake Seismoacoustic Sources - I

Type: Oral

Date: 4/16/2026

Presentation Time: 08:15 AM (local time)

Presenting Author: Junghyun Park

Student Presenter: No

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