Journal
TECTONOPHYSICS
Volume 408, Issue 1-4, Pages 265-307Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tecto.2005.05.039
Keywords
paleoseismology; liquefaction; tsunamis; varve chronology; bedrock fracturing; deglaciation; uplift; Sweden
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Paleoseismic data provide a long-term record of seismic activity to predict hazards for periods longer than one to a few centuries. In Sweden, the analysis reveals there was a drastic change in dominant seismic mode from a high to super-high deglacial mode to a low to moderately low mode in present and Late Holocene time. Paleoseismic criteria and characteristics include numerous different sources of information; viz. primary faults, bedrock deformation, sedimentary deformation, rock and sediment slides, liquefaction, sorting by shaking, tsunamis, differing geomorphic expressions, disordering and ordering of magnetic particles. By applying multiple criteria, it was possible to identify 44 paleoseismic events, including 23 events of estimated M 6-7, 12 events of M 7-8 and 6 events of.M > 8. Varve-dating often allows a precision as to a single year, in one case even to the season of a year. The key for paleoseismic reconstruction and testing is the application of multiple criteria. (c) 2005 Published by Elsevier B.V.
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