Department of Earth Science, Geodynamics Group www.geo.uib.no Svalbard earthquake of 21 Feb. 2008 (M=6.0) K. Atakan, L. Ottemöller, M. Raeesi and J. Havskov.

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Presentation transcript:

Department of Earth Science, Geodynamics Group Svalbard earthquake of 21 Feb (M=6.0) K. Atakan, L. Ottemöller, M. Raeesi and J. Havskov

Department of Earth Science, Geodynamics Group Jordskjelvet på Svalbard 21 februar 2008 (M=6.0)

Department of Earth Science, Geodynamics Group Svalbard earthquake (21.feb.2008) recorded at Tromsø station

Department of Earth Science, Geodynamics Group Svalbard earthquake (21.feb. 2008) record at Kings Bay (Spitsbergen).

Department of Earth Science, Geodynamics Group Svalbard earthquake (21.feb. 2008) record at Bjørnøya station.

Department of Earth Science, Geodynamics Group Svalbard earthquake (21.feb. 2008) record at Kongsberg station.

Department of Earth Science, Geodynamics Group

Department of Earth Science, Geodynamics Group The earthquake occurred likely between the Billedfjord and Lomfjorden faults. More than 2000 aftershocks are recorded.

Department of Earth Science, Geodynamics Group More than 200 aftershocks are located.

Department of Earth Science, Geodynamics Group MT-inversion on regional stations (depth fixed to 15 km)

Department of Earth Science, Geodynamics Group MT-inversion on local stations

Department of Earth Science, Geodynamics Group Focal mechanism based on the first motion polarities (left) and based on the slip inversion (right)

Department of Earth Science, Geodynamics Group

Department of Earth Science, Geodynamics Group (Ingolfsson, 2007)

Department of Earth Science, Geodynamics Group (Ingolfsson, 2007) The focal mechanism is compatible with E-W oriented maximum horizontal compression. Fault rupture area is roughly 9 x 11 km.

Department of Earth Science, Geodynamics Group (Breivik et al., 2005)

Department of Earth Science, Geodynamics Group (Breivik et al., 2005)

Department of Earth Science, Geodynamics Group (Breivik et al., 2005)

Department of Earth Science, Geodynamics Group Norsk Nasjonalt Seismisk Nettverk (NNSN) Institutt for geovitenskap, Universitetet i Bergen

Department of Earth Science, Geodynamics Group Thank you for your attention!