Summary & Purpose
Infrasound may be used to detect the approach of hazardous volcanic mudflows, known as lahars, tens of minutes before they arrive at a downstream monitoring station. We have analyzed signals from more than 20 secondary lahars caused by precipitation events at Fuego Volcano during Guatemala’s rainy season in May through October of 2022. We are able to quantify the capabilities of infrasound monitoring through comparison with seismic data, time lapse video footage, and high-resolution video of an event occurring on 17 August 2022. We determine that infrasound sensors, deployed adjacent to the lahar path and in small-aperture (10s of meters) array configurations, are particularly sensitive to remote detection of lahars, including relatively small-sized events, at distances greater than 5 km. At Fuego Volcano early detection can provide timely forecasts of up to 30 minutes before lahars arrive at a monitoring site. Lahars are one of the primary hazards at volcanoes and can occur both during eruption and spontaneously without an eruption. We propose that continuous infrasound monitoring can serve as a valuable tool to minimize impacts to property and people living near volcanoes.
Date of Publication or Submission
National Science Foundations (NSF) EAR Grants 1914491 and 1914526
Single Dataset or Series?
*.mat and *.txt
Digital waveform data are provided as 3D matrices in a MATLAB binary format. Data are contained in two separate files, 'AUG17data.mat' and 'lahars2022data.mat', and detailed below. AUG17data.mat contains waveform data for the 17 August lahar for all seismo-acoustic data while lahars2022data.mat contains data from 22 lahars recorded at FG14. Video data are presented in compressed formats as Supplementary Materials (animations) in the paper "Infrasound Early Warning Detections for Lahars". High resolution original video can be made available for scientific or educational purposes with a request made directly to the authors of this dataset. See additional information about the data files provided in README.txt.
August 17, 2022 and May 27 - October 13, 2022
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Johnson, Jeffrey B.; Roca, Amilcar; Bejar, Gustavo; and Waite, Gregory P., "Dataset for Infrasound Early Warning Detections for Lahars" (2022). Boise State University Infrasound Data Repository. 10.