Surface deformation of Seguam volcano, Alaska by magma supply dynamics using SAR interferometry

Chang Wook Lee, Zhong Lu, Daniel Dzurisin, Joong Sun Won, Jung Hyun Choi, Hyung Sup Jung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Seguam Volcano is located in the central Aleutian arc, in Alaska, where three representative caldera margins have been placed. Those caldera margins have district own mechanism due to dynamics interrelation caused by deflation of the shallow magma source or inflation of the deep magma one that span the time period from 1992 to 2007. Especially, SBAS (small baseline subset) technique applied by multiple interferograms generates the temporal deformation map by reducing atmospheric artifacts, DEM errors and etc. While the subsidence around the eastern caldera had been caused by deflation of shallow source, the uplift might have been influenced by a deep source. These results of precise surface deformation mapping with an improved SBAS InSAR technique provide better understandings of the dynamic magma plumbing systems in the Seguam volcano. Seguam Island has unique characteristics of holding three different mechanisms associated with caldera margins, among which only eastern caldera margin has reiterated the subsidence and uplift of crustal surface by extrusion or intrusion of lava flow in the reservoir. For this reason, the eastern caldera margin might be more dangerous than others because of its possibility of eruption due to its unstable magma source.

Original languageEnglish
Title of host publication60th International Astronautical Congress 2009, IAC 2009
Pages2616-2619
Number of pages4
Publication statusPublished - 2009
Event60th International Astronautical Congress 2009, IAC 2009 - Daejeon, Korea, Republic of
Duration: 2009 Oct 122009 Oct 16

Publication series

Name60th International Astronautical Congress 2009, IAC 2009
Volume4

Other

Other60th International Astronautical Congress 2009, IAC 2009
CountryKorea, Republic of
CityDaejeon
Period09/10/1209/10/16

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Astronomy and Astrophysics

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  • Cite this

    Lee, C. W., Lu, Z., Dzurisin, D., Won, J. S., Choi, J. H., & Jung, H. S. (2009). Surface deformation of Seguam volcano, Alaska by magma supply dynamics using SAR interferometry. In 60th International Astronautical Congress 2009, IAC 2009 (pp. 2616-2619). (60th International Astronautical Congress 2009, IAC 2009; Vol. 4).