EXTENDING THE TEMPORAL COVERAGE OF ICELANDIC CRUSTAL DEFORMATION MEASUREMENTS THROUGH ENVISAT InSAR IMAGES 1

• Main Authors: Rikke Pedersen, Freysteinn Sigmundsson, Andrew J. Hooper, Kurt L. Feigl
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Asar; Askja; Krafla; Hekla; Iceland
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.396.8077

Iceland has for decades been an international target for geodetic studies, as it provides opportunity to study a wide variety of crustal deformation processes, including plate tectonics, magmatism, and responses of the crust due to load variations. We here present results from crustal deformation surveillance spanning 2003-2006, obtained from interferometric processing of ASAR ENVISAT images, contributing to an extension of the time series of ongoing deformation processes in Iceland. More than 100 ASAR interferograms (ha>50 m), have been produced so far, spatially covering the entire neotectonic zone. The interferograms show three areas of significant deformation. Hekla and Askja volcanic systems continue to deform in a similar manner as observed with ERS interferometry 1992-2000. At the Krafla volcanic system subsidence due to processes in a shallow magma chambers appears to have stopped, while other processes related to plate spreading and possible deep accumulation of magma continue. 1.