Vulcanian explosive cycles: Patterns and predictability

S.F.L. Watt, T.A. Mather, D.M. Pyle

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Repetitive and violent Vulcanian explosion sequences are common hazards at many volcanoes. Statistical analyses of such sequences form the basis of forecasting models and reveal underlying explosive processes. However, no single statistical model describes interexplosion repose intervals in Vulcanian systems. Soufrière Hills, Montserrat, is best described by a log-logistic model, while Sakurajima, Japan, shows a transition from a log-logistic to a Weibull model as activity intensifies. Anak Krakatau, Indonesia, displays two failure modes on different time scales, both described by Weibull distributions. At the Kameni Islands, Santorini, Greece, model-fitting parameters vary between eruption cycles. Rates of magma rise and pressurization may be the most important controls in determining the statistical distribution of repose intervals in Vulcanian systems.
Original languageEnglish
Pages (from-to)839-842
Number of pages4
JournalGeology
Volume35
Issue number9
DOIs
Publication statusPublished - 1 Sep 2007

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