Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine volcano, Alaska
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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.
Study Area
| 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 |
| Publication Date | September 20, 2006 |
| Year Published | 2006 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Volcano Hazards Program |
| Description | L18304, 5 p. |
| Country | United States |
| State | Alaska |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |