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13 - Glacially Induced Faults in Finland

from Part III - Glacially Triggered Faulting in the Fennoscandian Shield

Published online by Cambridge University Press:  02 December 2021

By
Raimo Sutinen ,
Eija Hyvönen ,
Mira Markovaara-Koivisto ,
Maarit Middleton ,
Antti E. K. Ojala ,
Jukka-Pekka Palmu ,
Timo Ruskeeniemi  and
Jussi Mattila
Edited by
Holger Steffen ,
Odleiv Olesen  and
Raimo Sutinen
Holger Steffen
Affiliation:
Lantmäteriet, Sweden
Odleiv Olesen
Affiliation:
Geological Survey of Norway
Raimo Sutinen
Affiliation:
Geological Survey of Finland
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Summary

The zones of glacially induced faults in Finland are portrayed by a number of discrete <10 km-long fault scarps, often forming multiple parallel segments and establishing longer glacially induced fault systems. A set of glacially induced fault systems further form glacially induced fault complexes, which may extend tens of kilometres cross-cutting glacial sediments. The systematic mapping has revealed 18 glacially induced fault systems forming 9 glacially induced fault complexes. The moment magnitude estimates for the earthquakes in Finnish Lapland are in the range of Mw ≈ 4.9–7.5. The detailed trenching across fault scarps provides evidence of non-stationary seismicity and occurrence of multiple slip events even before the Late Weichselian maximum.

Keywords

Glacially Induced FaultFault SystemFault ComplexPalaeoearthquakeLandslideRemote SensingDigital Elevation ModelTrenchingRadiocarbon DatingFinland
Type
Chapter
Information
Glacially-Triggered Faulting , pp. 231 - 245
Publisher: Cambridge University Press
Print publication year: 2021

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