Summary & Purpose
We explore the capabilities of volcano opto-acoustics, a promising technique for measuring explosion and infrasound resonance phenomena at open-vent volcanoes. Joint visual and infrasound study at Yasur Volcano (Vanuatu) demonstrate that even consumer-grade cameras are capable of recording infrasound with high fidelity. Passage of infrasonic waves ranging from 20 Pa to hundreds of Pa, from both explosions and persistent tremor, pressurizes and depressurizes ambient plumes inducing vaporization and condensation respectively and can be used for optical tracking of pressure waves. Image filtering and processing applied to standard video thus appears capable of replicating the spatio-temporal evolution of the sound wavefield. Wavefield maps can illuminate the propagation of blasts as well as the dynamics of infrasonic tremor possibly associated with standing waves in the craters. We propose that opto-acoustic monitoring may be used to extract near-vent infrasound signal and track volcanic unrest from a remote distance.
Date of Publication or Submission
National Science Foundation (NSF) EAR Grant 1830976 and National Geographic’s Documentary Welcome to Earth
Single Dataset or Series?
*.mp4; *.mat; and *.txt
All information about the data files is provided in README.txt.
Map Area Coordinate System
latitude -19.53055, longitude 169.44856
December 9, 2019
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Johnson, Jeffrey; Boyer, Thomas; Watson, Leighton; and Anderson, Jacob, "Dataset for Volcano Opto-Acoustics: Mapping the Infrasound Wavefield at Yasur Volcano (Vanuatu)" (2022). Boise State University Infrasound Data Repository. 9.