Deformation of the Augustine Volcano, Alaska, 1992-2005, measured by ERS and ENVISAT SAR interferometry

Chang Wook Lee, Zhong Lu, Oh Ig Kwoun, Joong-sun Won

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The Augustine Volcano is a conical-shaped, active stratovolcano located on an island of the same name in Cook Inlet, about 290 km southwest of Anchorage, Alaska. Augustine has experienced seven significant explosive eruptions - in 1812, 1883, 1908, 1935, 1963, 1976, 1986, and in January 2006. To measure the ground surface deformation of the Augustine Volcano before the 2006 eruption, we applied satellite radar interferometry using Synthetic Aperture Radar (SAR) images from three descending and three ascending satellite tracks acquired by European Remote Sensing Satellite (ERS) 1 and 2 and the Environment Satellite (ENVISAT). Multiple interferograms were stacked to reduce artifacts caused by atmospheric conditions, and we used a singular value decomposition method to retrieve the temporal deformation history from several points on the island. Interferograms during 1992 and 2005 show a subsidence of about 1-3 cm/year, caused by the contraction of pyroclastic flow deposits from the 1986 eruption. Subsidence has decreased exponentially with time. Multiple interferograms between 1992 and 2005 show no significant inflation around the volcano before the 2006 eruption. The lack of a pre-eruption deformation signal suggests that the deformation signal from 1992 to August 2005 must have been very small and may.have been obscured by atmospheric delay artifacts.

Original languageEnglish
Pages (from-to)447-452
Number of pages6
JournalEarth, Planets and Space
Volume60
Issue number5
DOIs
Publication statusPublished - 2008 Jan 1

Fingerprint

radar interferometry
synthetic aperture radar
volcanoes
volcanic eruptions
remote sensing
interferometry
volcano
volcanic eruption
subsidence
artifact
artifacts
Cook Inlet (AK)
stratovolcano
pyroclastic flow
meteorology
inflation
contraction
radar
explosive
deposits

All Science Journal Classification (ASJC) codes

  • Geology
  • Space and Planetary Science

Cite this

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abstract = "The Augustine Volcano is a conical-shaped, active stratovolcano located on an island of the same name in Cook Inlet, about 290 km southwest of Anchorage, Alaska. Augustine has experienced seven significant explosive eruptions - in 1812, 1883, 1908, 1935, 1963, 1976, 1986, and in January 2006. To measure the ground surface deformation of the Augustine Volcano before the 2006 eruption, we applied satellite radar interferometry using Synthetic Aperture Radar (SAR) images from three descending and three ascending satellite tracks acquired by European Remote Sensing Satellite (ERS) 1 and 2 and the Environment Satellite (ENVISAT). Multiple interferograms were stacked to reduce artifacts caused by atmospheric conditions, and we used a singular value decomposition method to retrieve the temporal deformation history from several points on the island. Interferograms during 1992 and 2005 show a subsidence of about 1-3 cm/year, caused by the contraction of pyroclastic flow deposits from the 1986 eruption. Subsidence has decreased exponentially with time. Multiple interferograms between 1992 and 2005 show no significant inflation around the volcano before the 2006 eruption. The lack of a pre-eruption deformation signal suggests that the deformation signal from 1992 to August 2005 must have been very small and may.have been obscured by atmospheric delay artifacts.",
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Deformation of the Augustine Volcano, Alaska, 1992-2005, measured by ERS and ENVISAT SAR interferometry. / Lee, Chang Wook; Lu, Zhong; Kwoun, Oh Ig; Won, Joong-sun.

In: Earth, Planets and Space, Vol. 60, No. 5, 01.01.2008, p. 447-452.

Research output: Contribution to journalArticle

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