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GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L14604, doi:10.1029/2004GL020020, 2004

Volcanic eruptions observed with infrasound

Jeffrey B. Johnson

Climate Change Research Center, University of New Hampshire, Durham, New Hampshire, USA


Richard C. Aster

Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA


Philip R. Kyle

Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA


Abstract

Infrasonic airwaves produced by active volcanoes provide valuable insight into the eruption dynamics. Because the infrasonic pressure field may be directly associated with the flux rate of gas released at a volcanic vent, infrasound also enhances the efficacy of volcanic hazard monitoring and continuous studies of conduit processes. Here we present new results from Erebus, Fuego, and Villarrica volcanoes highlighting uses of infrasound for constraining quantitative eruption parameters, such as eruption duration, source mechanism, and explosive gas flux.

Received 17 March 2004; accepted 22 June 2004; published 21 July 2004.

Index Terms: 0394 Atmospheric Composition and Structure: Instruments and techniques; 8414 Volcanology: Eruption mechanisms; 8419 Volcanology: Eruption monitoring (7280); 8494 Volcanology: Instruments and techniques.

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Citation: Johnson, J. B., R. C. Aster, and P. R. Kyle (2004), Volcanic eruptions observed with infrasound, Geophys. Res. Lett., 31, L14604, doi:10.1029/2004GL020020.