Cornou, Cécile and Ampuero, Jean-Paul and Aubert, Coralie and Audin, Laurence and Baize, Stéphane and Billant, Jérémy and Brenguier, Florent and Causse, Mathieu and Chlieh, Mohamed and Combey, Andy and de Michele, Marcello and Delouis, Bertrand and Deschamps, Anne and Ferry, Matthieu and Foumelis, Michael and Froment, Bérénice and Gélis, Céline and Grandin, Raphaël and Grasso, Jean-Robert and Hannouz, Estelle and Hok, Sébastien and Jung, Axel and Jolivet, Romain and Langlais, Mickaël and Langlaude, Philippe and Larroque, Christophe and Leloup, Philippe Hervé and Manchuel, Kevin and Marconato, Léo and Maron, Christophe and Mathot, Emmanuel and Maufroy, Emeline and Mercerat, Diego and Métois, Marianne and Neyman, Emmanuelle and Pondaven, Ildut and Provost, Ludmila and Régnier, Julie and Ritz, Jean-François and Rivet, Diane and Schlupp, Antoine and Sladen, Anthony and Voisin, Christophe and Walpersdorf, Andrea and Wolynieck, David and Allemand, Pascal and Beck, Elise and Bertrand, Etienne and Bertrand, Véronique and Briole, Pierre and Brunel, Didier and Cavalié, Olivier and Chèze, Jérôme and Courboulex, Françoise and Douste-Bacqué, Isabelle and Dretzen, Rémi and Giampietro, Tiziano and Godano, Maxime and Grandjean, Philippe and Grunberg, Marc and Guérin, Gauthier and Guillot, Stéphane and el Haber, Elias and Hernandez, Alain and Jomard, Hervé and Lasserre, Cécile and Liang, Chao and Lior, Itzhak and Martin, Xavier and Mata, Daniel and Ménager, Marine and Mercier, Antoine and Mordret, Aurélien and Oral, Elif and Paul, Anne and Peix, Fabrice and Péquégnat, Catherine and Pernoud, Michel and Satriano, Claudio and Sassi, Rihab and Schaming, Marc and Sellier, Valérie and Sira, Christophe and Socquet, Anne and Sue, Christian and Trilla, Aurélie and Vallée, Martin and van den Ende, Martijn and Vernant, Philippe and Vial, Benjamin and Weng, Huihui (2020) Rapid response to the M_w 4.9 earthquake of November 11, 2019 in Le Teil, Lower Rhône Valley, France. Center for Open Science . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20200911-133130188
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Abstract
On November 11, 2019, a Mw 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on the eastern margin of the Massif Central close to the external part of the Alps. Occuring in a moderate seismicity area, this earthquake is remarkable for its very shallow focal depth (between 1 and 3 km), its magnitude, and the moderate to large damages it produced in several villages. InSAR interferograms indicated a shallow rupture about 4 km long reaching the surface and the reactivation of the ancient NE-SW La Rouviere normal fault in reverse faulting in agreement with the present-day E-W compressional tectonics. The peculiarity of this earthquake together with a poor coverage of the epicentral region by permanent seismological and geodetic stations triggered the mobilisation of the French post-seismic unit and the broad French scientific community from various institutions, with the deployment of geophysical instruments (seismological and geodesic stations), geological field surveys, and field evaluation of the intensity of the earthquake. Within 7 days after the mainshock, 47 seismological stations were deployed in the epicentral area to improve the Le Teil aftershocks locations relative to the French permanent seismological network (RESIF), monitor the temporal and spatial evolution of microearthquakes close to the fault plane and temporal evolution of the seismic response of 3 damaged historical buildings, and to study suspected site effects and their influence in the distribution of seismic damage. This seismological dataset, completed by data owned by different institutions, was integrated in a homogeneous archive and distributed through FDSN web services by the RESIF data center. This dataset, together with observations of surface rupture evidences, geologic, geodetic and satellite data, will help to unravel the causes and rupture mechanism of this earthquake, and contribute to account in seismic hazard assessment for earthquakes along the major regional Cévenne fault system in a context of present-day compressional tectonics.
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| Additional Information: | License: CC-By Attribution 4.0 International. Created: September 05, 2020 | Last edited: September 05, 2020. This manuscript has been submitted for publication in Comptes Rendus Geosciences. Please note that the manuscript has yet been accepted for publication. We acknowledge mayors and inhabitants of le Teil, Viviers, Aubinas, Saint Thomé, Alba-la-Romaine, Larnas and Chateauneuf-du-Rhône who help us in deployment of seismological and geodetic stations in the field. We acknowledge prefectures and SIDPC of Drôme and Ardèche departments, and mayors, town hall employers and inhabitants of the 24 cities visted by the GIM Team. Field experiments were supported by fundings from ISTerre, Géoazur, CEREMA, IRSN, Géosciences Montpellier, LGL-TPE, PACTE, EOST/BCSF-RéNass, RAP-RESIF, INSU, Action Transversale Sismicité (ATS) of RESIF. RESIF is a national Research Infrastructure recognized as such by the French Ministry of higher education and research. It is additionally supported by a public grant overseen by the French national research agency (ANR) as part of the “Investissements d’Avenir” program (reference: ANR-11-EQPX-0040) and the French Ministry of ecology, sustainable development and energy. RESIF; (1995): RESIF-RLBP French Broad-band network, RESIF-RAP strong motion network and other seismic stations in metropolitan France; RESIF - Réseau Sismologique et géodésique Français. http://dx.doi.org/10.15778/RESIF.FR. RESIF; (1995): RESIF-RAP French Accelerometric Network; RESIF - Réseau Sismologique et géodésique Français. http://dx.doi.org/10.15778/RESIF.RA. Bertrand, E., Cornou, C., Gélis, C., Rivet, D., & SISMOB-RESIF. (2019). Le Teil P5 post seismic experiment. RESIF - Réseau Sismologique et géodésique Français. https://doi.org/10.15778/10.15778/RESIF.3C2019. AlpArray Seismic Network; (2015): AlpArray Seismic Network (AASN) temporary component. AlpArray Working Group. http://dx.doi.org/10.12686/alparray/z3_2015. Sentinel-1 data used in this study is copyright of European Commission (EU), Copernicus program, operated by the European Space Agency (ESA). The data was obtained via the PEPS portal of the Centre National d'Etudes Spatiales (CNES). The DAS measurements were made on the Ardèche Drôme Numérique telecom network with the help of the people from the ADTIM company in charge of the network. Information on the historical earthquake were extracted from the SisFrance, BRGM, EDF, ISRN database (last accessed, February 4, 2020). | ||||||||||||||||||||||||||||||||||||
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| Subject Keywords: | Le Teil Earthquake, Rhône valley, seismic sequence, post-seismic | ||||||||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20200911-133130188 | ||||||||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20200911-133130188 | ||||||||||||||||||||||||||||||||||||
| Official Citation: | Cornou, C., Ampuero, J., aubert, C., Audin, L., Baize, S., Billant, J., … Weng, H. (2020, September 5). Rapid response to the Mw 4.9 earthquake of November 11, 2019 in Le Teil, Lower Rhône Valley, France. https://doi.org/10.31219/osf.io/3afs5 | ||||||||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||||||
| ID Code: | 105330 | ||||||||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||||||
| Deposited By: | George Porter | ||||||||||||||||||||||||||||||||||||
| Deposited On: | 14 Sep 2020 20:22 | ||||||||||||||||||||||||||||||||||||
| Last Modified: | 14 Sep 2020 20:22 |
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