Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes
International audience The 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...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.science/hal-02558456 https://doi.org/10.1002/2016GL069359 |
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ftunivnantes:oai:HAL:hal-02558456v1 2023-05-15T16:11:55+02:00 Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes Craig, T.J. Calais, E. Fleitout, L. Bollinger, L. Scotti, O. École normale supérieure - Lyon (ENS Lyon) Bureau d'évaluation des risques sismiques pour la sûreté des installation (IRSN/PRP-DGE/SCAN/BERSSIN) Institut de Radioprotection et de Sûreté Nucléaire (IRSN) 2016-07-16 https://hal.science/hal-02558456 https://doi.org/10.1002/2016GL069359 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2016GL069359 hal-02558456 https://hal.science/hal-02558456 doi:10.1002/2016GL069359 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02558456 Geophysical Research Letters, 2016, 43 (13), pp.6826-6836. ⟨10.1002/2016GL069359⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2016 ftunivnantes https://doi.org/10.1002/2016GL069359 2023-03-08T04:41:44Z International audience The 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. ©2016. American Geophysical Union. All Rights Reserved. Article in Journal/Newspaper Fennoscandia Université de Nantes: HAL-UNIV-NANTES Geophysical Research Letters 43 13 6826 6836 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
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English |
topic |
[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Craig, T.J. Calais, E. Fleitout, L. Bollinger, L. Scotti, O. Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The 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. ©2016. American Geophysical Union. All Rights Reserved. |
author2 |
École normale supérieure - Lyon (ENS Lyon) Bureau d'évaluation des risques sismiques pour la sûreté des installation (IRSN/PRP-DGE/SCAN/BERSSIN) Institut de Radioprotection et de Sûreté Nucléaire (IRSN) |
format |
Article in Journal/Newspaper |
author |
Craig, T.J. Calais, E. Fleitout, L. Bollinger, L. Scotti, O. |
author_facet |
Craig, T.J. Calais, E. Fleitout, L. Bollinger, L. Scotti, O. |
author_sort |
Craig, T.J. |
title |
Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
title_short |
Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
title_full |
Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
title_fullStr |
Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
title_full_unstemmed |
Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
title_sort |
evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02558456 https://doi.org/10.1002/2016GL069359 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02558456 Geophysical Research Letters, 2016, 43 (13), pp.6826-6836. ⟨10.1002/2016GL069359⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2016GL069359 hal-02558456 https://hal.science/hal-02558456 doi:10.1002/2016GL069359 |
op_doi |
https://doi.org/10.1002/2016GL069359 |
container_title |
Geophysical Research Letters |
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43 |
container_issue |
13 |
container_start_page |
6826 |
op_container_end_page |
6836 |
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1765997125614698496 |