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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Instruments and techniques
  • Volcanology: Eruption mechanisms
  • Volcanology: Eruption monitoring
  • Volcanology: Instruments and techniques

Abstract

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

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.

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.

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