Unprecedented seismic swarm in the Maurienne valley (2017–2019) observed by the SISmalp Alpine seismic network: operational monitoring and management - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Comptes Rendus. Géoscience Année : 2022

Unprecedented seismic swarm in the Maurienne valley (2017–2019) observed by the SISmalp Alpine seismic network: operational monitoring and management

Résumé

In 2017-2019, a seismic swarm was triggered in the Maurienne valley (French Alps), with more than 5000 events detected by the regional SISmalp network. The population, who asked SISmalp to provide information on the processes and the associated risk, felt many earthquakes. In a post-L'Aquila trial context, we conducted a reflection on the scientific and social operational management of the crisis. The geological and tectonic analysis, the deployment of a temporary seismic network, an automatic double-difference relocation procedure (HypoDD) after clustering earthquakes, as well as the interactions with the population and the risk managers, have been carried out jointly. The length and unpredictability of the sequence complicated crisis management and the relations between local authorities and civil protection. The involvement of SISmalp, beyond its main scientific and observation prerogatives, has contributed to moderate the fears of the population by providing scientific explanations.
Fichier principal
Vignette du fichier
CRGEOS_2021__353_S1_517_0.pdf (7.46 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03633666 , version 1 (07-04-2022)

Identifiants

Citer

Philippe Gueguen, Gaël Janex, Jérôme Nomade, Mickaël Langlais, Agnès Helmstetter, et al.. Unprecedented seismic swarm in the Maurienne valley (2017–2019) observed by the SISmalp Alpine seismic network: operational monitoring and management. Comptes Rendus. Géoscience, 2022, Seismicity in France, 353 (S1), pp.517-534. ⟨10.5802/crgeos.70>⟩. ⟨hal-03633666⟩
47 Consultations
32 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More