Please use this identifier to cite or link to this item: http://dlib.scu.ac.ir/handle/1956/5227
Title: The seismotectonics of western Skagerrak
subject: Sorgenfrei-Tornquist zone;Hypocenter depth;Seismotectonics;Skagerrak;VDP::Mathematics and natural science: 400::Geosciences: 450
Publisher: Springer
Description: The seismically active Skagerrak region in the border area between Denmark and Norway has traditionally been associated with uncertain earthquake locations due to the limited station coverage in the region. A new seismic station in southern Norway and a recent update of the earthquake database of the Danish National Network have led to a much more complete and homogeneous data coverage of the Skagerrak area, giving the possibility of improved earthquake locations in the region. In this study, we relocate earthquakes in the Skagerrak area to obtain a more exact picture of the seismicity and investigate well-recorded events to determine the depth distribution. Hypocenter depths are found to be generally in the range 11–25 km. Furthermore, new composite focal mechanisms are determined for clusters of events with similar waveforms. Results indicate that the Skagerrak seismicity is associated with shallow, crustal faults oriented in the NS direction south of the Sorgenfrei–Tornquist Zone (STZ) as well as with the STZ itself. Mainly reverse faulting mechanisms along NE– SW oriented faults indicate maximum horizontal compression in the NW–SE direction. This is in agreement with World Stress Map generalizations, most likely associated with ridge push forces from the mid-Atlantic ridge, though modified probably by local crustal weaknesses.
Journal Article
publishedVersion
URI: https://bora.uib.no/handle/1956/5227
More Information: Journal of Seismology 15(49): 599-611
1383-4649
http://hdl.handle.net/1956/5227
10.1007/s10950-011-9235-x
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: The seismotectonics of western Skagerrak
subject: Sorgenfrei-Tornquist zone;Hypocenter depth;Seismotectonics;Skagerrak;VDP::Mathematics and natural science: 400::Geosciences: 450
Publisher: Springer
Description: The seismically active Skagerrak region in the border area between Denmark and Norway has traditionally been associated with uncertain earthquake locations due to the limited station coverage in the region. A new seismic station in southern Norway and a recent update of the earthquake database of the Danish National Network have led to a much more complete and homogeneous data coverage of the Skagerrak area, giving the possibility of improved earthquake locations in the region. In this study, we relocate earthquakes in the Skagerrak area to obtain a more exact picture of the seismicity and investigate well-recorded events to determine the depth distribution. Hypocenter depths are found to be generally in the range 11–25 km. Furthermore, new composite focal mechanisms are determined for clusters of events with similar waveforms. Results indicate that the Skagerrak seismicity is associated with shallow, crustal faults oriented in the NS direction south of the Sorgenfrei–Tornquist Zone (STZ) as well as with the STZ itself. Mainly reverse faulting mechanisms along NE– SW oriented faults indicate maximum horizontal compression in the NW–SE direction. This is in agreement with World Stress Map generalizations, most likely associated with ridge push forces from the mid-Atlantic ridge, though modified probably by local crustal weaknesses.
Journal Article
publishedVersion
URI: https://bora.uib.no/handle/1956/5227
More Information: Journal of Seismology 15(49): 599-611
1383-4649
http://hdl.handle.net/1956/5227
10.1007/s10950-011-9235-x
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: The seismotectonics of western Skagerrak
subject: Sorgenfrei-Tornquist zone;Hypocenter depth;Seismotectonics;Skagerrak;VDP::Mathematics and natural science: 400::Geosciences: 450
Publisher: Springer
Description: The seismically active Skagerrak region in the border area between Denmark and Norway has traditionally been associated with uncertain earthquake locations due to the limited station coverage in the region. A new seismic station in southern Norway and a recent update of the earthquake database of the Danish National Network have led to a much more complete and homogeneous data coverage of the Skagerrak area, giving the possibility of improved earthquake locations in the region. In this study, we relocate earthquakes in the Skagerrak area to obtain a more exact picture of the seismicity and investigate well-recorded events to determine the depth distribution. Hypocenter depths are found to be generally in the range 11–25 km. Furthermore, new composite focal mechanisms are determined for clusters of events with similar waveforms. Results indicate that the Skagerrak seismicity is associated with shallow, crustal faults oriented in the NS direction south of the Sorgenfrei–Tornquist Zone (STZ) as well as with the STZ itself. Mainly reverse faulting mechanisms along NE– SW oriented faults indicate maximum horizontal compression in the NW–SE direction. This is in agreement with World Stress Map generalizations, most likely associated with ridge push forces from the mid-Atlantic ridge, though modified probably by local crustal weaknesses.
Journal Article
publishedVersion
URI: https://bora.uib.no/handle/1956/5227
More Information: Journal of Seismology 15(49): 599-611
1383-4649
http://hdl.handle.net/1956/5227
10.1007/s10950-011-9235-x
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.