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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1630

Authors: Benoit, J. P.*
McNutt, S. R.*
Title: Global volcanic earthquake swarm database and preliminary analysis of volcanic earthquake swarm duration
Issue Date: Mar-1996
Series/Report no.: 39/2
URI: http://hdl.handle.net/2122/1630
Keywords: volcanic earthquake swarms
data-base
swarm duration
Abstract: Global data from 1979 to 1989 pertaining to volcanic earthquake swarms have been compiled into a custom-designed relational database. The database is composed of three sections: 1) a section containing general information on volcanoes, 2) a section containing earthquake swarm data (such as dates of swarm occurrence and durations), and 3) a section containing eruption information. The most abundant and reliable parameter, duration of volcanic earthquake swarms, was chosen for preliminary analysis. The distribution of all swarm durations was found to have a geometric mean of 5.5 days. Precursory swarms were then separated from those not associated with eruptions. The geometric mean precursory swarm duration was 8 days whereas the geometric mean duration of swarms not associated with eruptive activity was 3.5 days. Two groups of precursory swarms are apparent when duration is compared with the eruption repose time. Swarms with durations shorter than 4 months showed no clear relationship with the eruption repose time. However, the second group, lasting longer than 4 months, showed a significant positive correlation with the log10 of the eruption repose period. The two groups suggest that different suites of physical processes are involved in the generation of volcanic earthquake swarms.
Appears in Collections:04.06.08. Volcano seismology
04.08.06. Volcano monitoring
05.09.99. General or miscellaneous
Annals of Geophysics

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