Time series analysis of lava flux

H. M. Odbert*, G. Wadge

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)

Abstract

We have applied time series analytical techniques to the flux of lava from an extrusive eruption. Tilt data acting as a proxy for flux are used in a case study of the May-August 1997 period of the eruption at Soufrere Hills Volcano, Montserrat. We justify the use of such a proxy by simple calibratory arguments. Three techniques of time series analysis are employed: spectral, spectrogram and wavelet methods. in addition to the well-known similar to 9-hour periodicity shown by these data, a previously unknown periodic flux variability is revealed by the wavelet analysis as a 3-day cycle of frequency modulation during June-July 1997, though the physical mechanism responsible is not clear. Such time series analysis has potential for other lava flux proxies at other types of volcanoes. (C) 2009 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)305-314
Number of pages10
JournalJournal of Volcanology and Geothermal Research
Volume188
Issue number4
DOIs
Publication statusPublished - 15 Dec 2009

Keywords

  • lava flux
  • proxies
  • eruption processes
  • time series analysis
  • SOUFRIERE-HILLS-VOLCANO
  • MAGMA FLOW
  • MOUNT-ETNA
  • DEPENDENT VISCOSITY
  • KILAUEA VOLCANO
  • ERUPTION RATE
  • WEST-INDIES
  • REAL-TIME
  • MONTSERRAT
  • INSTABILITY

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