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FMHex20: An earthquake focal mechanism database for seismotectonic analyses in metropolitan France and bordering regions

Authors :
Mazzotti Stephane
Aubagnac Clémence
Bollinger Laurent
Coca Oscanoa Karla
Delouis Bertrand
Do Paco Denis
Doubre Cécile
Godano Maxime
Jomard Hervé
Larroque Christophe
Laurendeau Aurore
Masson Frédéric
Sylvander Matthieu
Trilla Aurélie
Source :
BSGF - Earth Sciences Bulletin, Vol 192, p 10 (2021)
Publication Year :
2021
Publisher :
EDP Sciences, 2021.

Abstract

We present a compilation of over 1700 focal mechanisms for nearly 1300 earthquakes in metropolitan France and bordering regions of Western Europe. It is based on both published and unpublished sources (articles, reports, observatory websites) for which the focal mechanism solutions have been verified for internal consistency, corrected in cases of minor errors and rejected in cases of major inconsistencies between the parameters. The database, labeled FMHex20, is a first version and should be regularly updated in the future as part of an ongoing effort within the Seismicity Transverse Action of the French Résif research infrastructure. We also present first-order seismotectonic analyses for the whole metropolitan France and for two regions (Western France and Northern Alps-Jura-Vosges) to illustrate how the FMHex20 database can serve as a basis for geodynamic or seismic hazard zonation studies. Combined with complementary datasets, it can improve our understanding of the kinematics of potentially active faults, including in very-low-strain-rate regions as is the case for most of France.

Details

Language :
English, French
ISSN :
17775817
Volume :
192
Database :
Directory of Open Access Journals
Journal :
BSGF - Earth Sciences Bulletin
Publication Type :
Academic Journal
Accession number :
edsdoj.7e9b1f3252ed4814b1ab324917a97665
Document Type :
article
Full Text :
https://doi.org/10.1051/bsgf/2020049