Surface Deformation of Seguam Volcano, Alaska by magma supply dynamics using SAR interferometry
- Paper number
IAC-09.B1.I.12
- Author
Mr. Chang-Wook Lee, Korea, Republic of
- Coauthor
Prof. Joong-Sun Won, Korea, Democratic People's Republic of
- Coauthor
Dr. Zhong Lu, United States
- Coauthor
Prof. Hyung-Sup Jung, Korea, Democratic People's Republic of
- Coauthor
Dr. Daniel Dzurisin, United States
- Year
2009
- Abstract
Seguam Volcano is located in the central Aleutian arc, in Alaska, where three calderas are placed. A time-series ERS-1/2 radar interferograms were generated to study the deformation from 1992 to 2007. The small baseline subset (SBAS) technique was applied for time-series analysis of the deformation while minimizing errors. Location and volume change of magma was modeled by Mogi model. Subsidence at each caldera is more closely correlated with individual activities of shallow source located directly below each caldera. However, the eastern caldera has especially reiterated subsidence and uplift in association with a deep source as well as a shallow source. The observation period was divided into four sub-stages according to the deformation pattern. While the subsidence around the east caldera had been caused by deflation of shallow source, the uplift had been influenced by a deep source.
- Abstract document
- Manuscript document
IAC-09.B1.I.12.pdf (🔒 authorized access only).
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