Conference papers
The 2019 Le Teil surface-rupturing earthquake along the La Rouvière Fault within the Cévennes fault system (France): What does paleoseismology reveal?
J. -F. Ritz
1
S. Baize
N. Cathelin
1
C. Thomasset
1, 2
M. Riesner
E. Hannouz
3
M. Ferry
1
C. Larroque
4
L. Audin
3
L. Bollinger
K. Manchuel
2
C. Sue
3
C. Vergniault
2
H. Jomard
5
P. Arroucau
2
M. Rizza
R. Le Roux-Mallouf
2
C. Vergniault 2
Author
H. Jomard 5
Author
P. Arroucau 2
Author
M. Rizza
Author IdHAL : magali-rizza ORCID : https://orcid.org/0000-0003-2364-5621
R. Le Roux-Mallouf 2
Author
1
Géosciences Montpellier (Place Eugène Bataillon - 34095 Montpellier cedex 5 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5243 (France)
- UA - Université des Antilles (Université des Antilles | Fouillole - BP 250 - 97157 Pointe-à-Pitre - France)
- UM - Université de Montpellier (163 rue Auguste Broussonnet - 34090 Montpellier - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR5243 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
2
EDF - EDF (France)
3
ISTerre - Institut des Sciences de la Terre (ISTerre, OSUG-C (Maison des Géosciences), 1381, rue de la Piscine, 38610 GIERES
ISTerre, Université Savoie Mont Blanc, Campus Scientifique, 73376 Le Bourget-du-Lac Cedex - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Institut de recherche pour le développement [IRD] : UR219 (France)
- USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc (27, rue Marcoz - 73000 Chambéry - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5275 (France)
- Université Gustave Eiffel (Cité Descartes, 5 Boulevard Descartes • Champs-sur-Marne, 77454 Marne-la-Vallée Cedex 2 - France)
- UGA - Université Grenoble Alpes (Adresse CS 40700 - 38058 Grenoble cedex - France)
4
OCA - Observatoire de la Côte d'Azur (B.P. 4229 06304 Nice Cedex 4 - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMS2202 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UAR2202 / UMS2202 (France)
5
CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement (Europôle Méditerranéen de l'Arbois - Avenue Louis Philibert - BP 80 - 13545 Aix-en-Provence cedex 4 - France)
- IRD - Institut de Recherche pour le Développement : UMR_D161 (Siège Le Sextant 44, bd de Dunkerque CS 90009 13572 Marseille cedex 02 - France)
- AMU - Aix Marseille Université : UM34 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
- CdF (institution) - Collège de France : UMR7330 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7330 (France)
- INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement : UMR1410 (France)
Abstract : The 2019-11-1, Mw4.9 Le Teil earthquake occurred within the NE termination of the Cévennes faults system (CFS) in southern France, along the La Rouvière fault (LRF), an Oligocene normal fault which was not known to be potentially active. This shallow moderate magnitude reversefaulting event produced a 5 km-long surface rupture and strong ground shaking. No evidence of previous quaternary activity was observed in the morphology, raising the question whether the fault had been reactivated for the first time since the Oligocene or had broken the surface in the past without being detected in the morphology. To address this issue, we carried out paleoseismological investigations to analyze and characterize evidences of paleo-ruptures in Quaternary deposits. We discovered that at least one event prior 2019, occurred between 13.5 and 3.3 ka within the central part of the fault segment that broke in 2019, and that a possible earlier surfacerupturing event occurred within the northern part of this segment during the 16th century. Further investigations coupling sub-surface geophysical investigations and trenching are now carried out within the southern and northern segments of the LRF as well as along the other fault segments of the CFS.
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https://hal-insu.archives-ouvertes.fr/insu-03661021
Contributor : Catherine Beaussier Connect in order to contact the contributor
Submitted on : Friday, May 6, 2022 - 2:45:28 PM
Last modification on : Tuesday, May 17, 2022 - 1:36:04 PM
Contributor : Catherine Beaussier Connect in order to contact the contributor
Submitted on : Friday, May 6, 2022 - 2:45:28 PM
Last modification on : Tuesday, May 17, 2022 - 1:36:04 PM
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- HAL Id : insu-03661021, version 1
- BIBCODE : 2022E3SWC.34204001R
- DOI : 10.1051/e3sconf/202234204001
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J. -F. Ritz, S. Baize, N. Cathelin, C. Thomasset, M. Riesner, et al.. The 2019 Le Teil surface-rupturing earthquake along the La Rouvière Fault within the Cévennes fault system (France): What does paleoseismology reveal?. Journées Scientifiques AGAP Qualité 2022, Paris, France, Edited by Asfirane, F.; Mari, J.-L.; E3S Web of Conferences, 0000, à renseigner, Unknown Region. ⟨10.1051/e3sconf/202234204001⟩. ⟨insu-03661021⟩
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