Reventador Volcano 2005: Eruptive activity inferred from seismo-acoustic observation

Jonathan M. Lees, Jeffrey B. Johnson, Mario Ruiz, Liliana Troncoso, Matt Welsh

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Reventador Volcano entered an eruptive phase in 2005 which included a wide variety of seismic and infrasonic activity. These are described and illustrated: volcano-tectonic, harmonic tremor, drumbeats, chugging and spasmodic tremor, long period and very long period events. The recording of this simultaneous activity on an array of three broadband, seismo-acoustic instruments provides detailed information of the state of the conduit and vent during this phase of volcanic eruption. Quasi-periodic tremor at Reventador is similar to that observed at other volcanoes and may be used as an indicator of vent aperture. Variations in the vibration modes of the volcano, frequency fluctuations and rapid temporal fluctuations suggest the influx of new material, choking of the vent and possible modification of the conduit geometry during explosions and effusion over a period of six weeks.

Original languageEnglish
Pages (from-to)179-190
Number of pages12
JournalJournal of Volcanology and Geothermal Research
Volume176
Issue number1
DOIs
StatePublished - 10 Sep 2008

Keywords

  • Ecuador
  • Reventador
  • drumbeat earthquakes
  • earthquakes
  • harmonic tremor
  • infrasound
  • volcanic earthquakes
  • volcano
  • volcano chugging

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