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Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine volcano, Alaska

Geophysical Research Letters

By:
, , ,
DOI: 10.1029/2006GL027219

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Abstract

On January 11, 2006 Augustine Volcano erupted after nearly 20 years of quiescence. Global Positioning System (GPS) instrumentation at Augustine, consisting of six continuously recording, telemetered receivers, measured clear precursory deformation consistent with a source of inflation or pressurization beneath the volcano's summit at a depth of around sea level. Deformation began in early summer 2005, and was preceded by a subtle, but distinct, increase in seismicity, which began in May 2005. After remaining more or less constant, deformation rates accelerated on at least three stations beginning in late November 2005. After this date, GPS data suggest the upward propagation of a small dike into the edifice, which, based on the style of deformation and high levels of gas emission, appears to have ascended to shallow levels by mid-December 2005, about four weeks before the eruption began. Copyright 2006 by the American Geophysical Union.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine volcano, Alaska
Series title:
Geophysical Research Letters
DOI:
10.1029/2006GL027219
Volume
33
Issue:
18
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters