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Catalogue de sismicité instrumentale en Mw pour la France métropolitaine : construction d’un jeu de référence en Mw unifiées

Abstract : Several studies have shown that Mw SI-Hex magnitudes may be underestimated compared to other catalogues. This work explores an alternative strategy for estimating Mw. The "direct" Mw are collected from several seismological institutes or specific studies. These Mw are analysed successively according to their origin (from global to specific) from intercomparisons, then the systematic deviations observed with respect to a GCMT Mw considered as reference are corrected. A reference set in unified Mw is thus constituted. It is finally compared with the Mw of the catalogues of neighbouring countries and with the local magnitude of the LDG. This poster was presented at the Résif Scientific and Technical Meetings held in Biarritz in November 2019. Résif is a national research infrastructure dedicated to the observation and understanding of the Earth's internal structure and dynamics. Résif is based on high technology observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout the French territory. The data collected allow the study of ground deformation, surface and deep structures, local and global seismicity and natural hazards, particularly seismic, on the French territory with a high spatio-temporal resolution. Résif is integrated into the European (EPOS - European Plate Observing System) and worldwide instruments that allow to image the Earth's interior in its entirety and to study many natural phenomena.
Keywords : Seismology France RESIF
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https://hal.archives-ouvertes.fr/hal-02415842
Contributor : Véronique Bertrand <>
Submitted on : Tuesday, December 17, 2019 - 12:28:10 PM
Last modification on : Tuesday, June 2, 2020 - 11:04:21 AM
Document(s) archivé(s) le : Wednesday, March 18, 2020 - 4:45:17 PM

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Aurore Laurendeau, Clément Christophe, Oona Scotti. Catalogue de sismicité instrumentale en Mw pour la France métropolitaine : construction d’un jeu de référence en Mw unifiées. Rencontres scientifiques et techniques RESIF 2019, Nov 2019, Biarritz, France. ⟨hal-02415842⟩

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