journal article Jul 04, 2016

Evidence for the release of long‐term tectonic strain stored in continental interiors through intraplate earthquakes

View at Publisher Save 10.1002/2016gl069359
Abstract
AbstractThe occurrence of large earthquakes in stable continental interiors challenges the applicability of the classical steady state “seismic cycle” model to such regions. Here we shed new light onto this issue using as a case study the cluster of large reverse faulting earthquakes that occurred in Fennoscandia at 11–9 ka, triggered by the removal of the ice load during the final phase of regional deglaciation. We show that these reverse‐faulting earthquakes occurred at a time when the horizontal strain rate field was extensional, which implies that these events did not release horizontal strain that was building up at the time but compressional strain that had been accumulated and stored elastically in the lithosphere over timescales similar to or longer than a glacial cycle. We argue that the tectonically stable continental lithosphere can store elastic strain on long timescales, the release of which may be triggered by rapid, local transient stress changes caused by surface mass redistribution, resulting in the occurrence of intermittent intraplate earthquakes.
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References
58
[7]
Cathles L. (1975)
[13]
England P. "Uncharted seismic risk" Nat. Geosci. (2012)
[28]
Lagerbäck R. (2008)
[29]
Lambeck K. andA.Purcell(2003) Glacial rebound and crustal stress in Finland Tech. Rep. 2003‐10 Posiva Finland.
[31]
Lindholm C. D. (2000)
[34]
Lund B. (2009)
[38]
Olesen O. (2014)
[49]
Stress and fault parameters affecting fault slip magnitude and activation time during a glacial cycle

Rebekka Steffen, Holger Steffen, Patrick Wu et al.

Tectonics 10.1002/2013tc003450

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Cited By
59
Geophysical Journal International
Metrics
59
Citations
58
References
Details
Published
Jul 04, 2016
Vol/Issue
43(13)
Pages
6826-6836
License
View
Funding
the Commissariat à l'Énergie Atomique (CEA/DASE/LDG)
the Institut de Radioprotection et Sûreté Nucléaire (IRSN)
Cite This Article
T. J. Craig, E. Calais, L. Fleitout, et al. (2016). Evidence for the release of long‐term tectonic strain stored in continental interiors through intraplate earthquakes. Geophysical Research Letters, 43(13), 6826-6836. https://doi.org/10.1002/2016gl069359
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