Volcanic deformation models for Deception Island (South Shetland Islands, Antarctica)

• Main Authors: A. Fernández-ros, M. Berrocoso, M. E. Ramírez
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Deception Island; South Shetland Islands; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.527.2162; http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea094.pdf

Summary GPS observations from a Deception Island Volcano geodetic network (South Shetland Islands, Antarctica) during 1991/1992 to 2002/2003 campaigns have characterized the deformation of the island resulting from its volcanic activity. From January 1992 to December 1999, radial extension together with an uplift episode was detected. During this period two important episodes of seismic activity took place, in particular, during the campaigns 1991/92 and 1998/99. From 2000 until 2003, no large displacements were detected, although the stations seem to converge in a radially compressive manner together with a subsidence, reflecting a change in the geodynamics of the island. Two clear alignments are observed on the contour maps that characterize the deformation, one in the NW-SE