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The 2006 eruption of Augustine Volcano - Combined analyses of thermal satellite data and reduced displacement: Chapter 23 in The 2006 eruption of Augustine Volcano, Alaska

Professional Paper 1769-23

By:
, , , , and
Edited by:
John A. Power, Michelle L. Coombs, and Jeffrey T. Freymueller

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Abstract

Augustine Volcano erupted explosively after 20 years of quiescence on January 11, 2006, followed by approximately 2 months of dome building and lava extrusion. This is the best monitored eruption in Alaska to date; the diverse complementary datasets gathered enable an interdisciplinary interpretation of volcanic activity. An analysis of reduced displacement (continuous measure of seismic tremor amplitude) and thermal energy output (from satellite imagery) observed between January 1 and April 30, 2006, shows relationships linked to the type of eruptive activity. Three different types of volcanic behavior can be identified as they show specific patterns in the combined data sets: (1) explosive activity, (2) lava extrusion (dome growth), and (3) cooling of erupted products. Explosive activity was characterized by high reduced displacement values but relatively low radiative thermal flux. Lava extrusion occurred in three distinct sequences characterized by increased values of reduced displacement and increased thermal emissions. Two periods of elevated thermal energy output and reduced displacement coincided with times of deflation, suggesting an increase in extrusion rate. Periods of cooling were marked by decreasing thermal emissions and reduced displacement. This work highlights the value of combined observations, which reveal more about the status of an active volcano than individual methods alone.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
The 2006 eruption of Augustine Volcano - Combined analyses of thermal satellite data and reduced displacement: Chapter 23 in The 2006 eruption of Augustine Volcano, Alaska
Series title:
Professional Paper
Series number:
1769
Chapter:
23
Year Published:
2010
Language:
English
Publisher:
U.S. Geological Survey
Contributing office(s):
Alaska Volcano Observatory
Description:
15 p.
Larger Work Type:
Report
Larger Work Title:
The 2006 eruption of Augustine Volcano, Alaska
First page:
553
Last page:
567
Country:
United States
State:
Alaska
Online Only (Y/N):
Y
Additional Online Files (Y/N):
N