Communication Dans Un Congrès Année : 2023

Recurrence time of large earthquakes at the western Alps-Mediteranean sea junction : from geological observations and modelling of the seismicity rate

Résumé

The junction between the Western Alps and the Ligurian basin in the Mediterranean Sea is one of the intraplate areas of Western Europe where strong earthquakes occur. The last of these earthquakes occurred in 1887 activating the Ligurian thrust, the major structure which has controlled most of the deformation in the area for about 5 Ma. The available data (GNSS, geological, seismological) allow us to hypothesize the recurrence time of M w 6.8 earthquake, equivalent to the 1887 earthquake, and lead to a range of 6500-3000 years.

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hal-04054371 , version 1 (03-04-2023)

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Christophe Larroque, Oona Scotti, Jenny Trévisan, Françoise Courboulex. Recurrence time of large earthquakes at the western Alps-Mediteranean sea junction : from geological observations and modelling of the seismicity rate. 11th International INQUA Workshop on Paleoseismology, Active Tectonics and Archaeoseismology (“PATA Days”), S. Baize, M. Rizza, Sep 2022, Aix-en-Provence, France. pp.113-116, ⟨10.5281/zenodo.7736477⟩. ⟨hal-04054371⟩
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