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SI-Hex; a new catalogue of instrumental seismicity for metropolitan France

Michel Cara, Yves Cansi, Antoine Schlupp, Pierre Arroucau, Nicole Bethoux, Eric Beucler, Stephane Bruno, Marie Calvet, Sebastien Chevrot, Alexandra Deboissy, Bertrand Delouis, Marylin Denieul, Anne Deschamps, Cecile Doubre, Julien Frechet, Stephanie Godey, Olivia Golle, Marc Grunberg, Jocelyn Guilbert, Meric Haugmard, Liliane Jenatton, Sophie Lambotte, Delphine Leobal, Christophe Maron, Veronique Mendel, Sophie Merrer, Marie Macquet, Arnaud Mignan, Antoine Mocquet, Marc Nicolas, Julie Perrot, Bertrand Potin, Olivier Sanchez, Jean-Paul Santoire, Olivier Sebe, Matthieu Sylvander, Francois Thouvenot, Jerome van der Woerd and Katia van der Woerd
SI-Hex; a new catalogue of instrumental seismicity for metropolitan France
Bulletin de la Societe Geologique de France (January 2015) 186 (1): 3-19


The aim of the SI-Hex project (acronym for << Sismicite Instrumentale de l'Hexagone >>) is to provide a catalogue of seismicity for metropolitan France and the French marine economic zone for the period 1962-2009 by taking into account the contributions of the various seismological networks and observatories from France and its neighbouring countries. The project has been launched jointly by the Bureau Central Sismologique Francais (CNRS-University/BCSF) and the Laboratoire de Detection et de Geophysique (CEA-DAM/LDG). One of the main motivations of the project is to provide the end user with the best possible information on location and magnitude of each earthquake. So far, due to the various procedures in use in the observatories, the different locations and magnitudes of earthquakes located in the SI-Hex zone were presenting large discrepancies. In the 2014 version of the catalogue, 1D localizations of hypocentres performed with a unique computational scheme and covering the whole 1962-2009 period constitute the backbone of the catalogue (SI-Hex solutions). When available, they are replaced by more precise localizations made at LDG or, for recent times, by the regional observatories within: 1) the French Alps, 2) the southernmost Alps and the Mediterranean domain including Corsica, 3) the Pyrenees, and 4) the Armorican massif. Moment magnitudes M (sub w) are systematically reported in the SI-Hex catalogue. They are computed from coda-wave analysis of the LDG records for most M (sub w) >3.4 events, and are converted from local magnitudes M (sub L) for smaller magnitude events. Finally, special attention is paid to the question of discrimination between natural and artificial seismic events in order to produce a catalogue for direct use in seismic hazard analysis and seismotectonic investigations. The SI-Hex catalogue is accessible on the web site and contains 38,027 earthquake hypocentres, together with their seismic moment magnitudes M (sub w) .

ISSN: 0037-9409
EISSN: 1777-5817
Serial Title: Bulletin de la Societe Geologique de France
Serial Volume: 186
Serial Issue: 1
Title: SI-Hex; a new catalogue of instrumental seismicity for metropolitan France
Affiliation: Universite de Strasbourg, Ecole et Observatoire des Sciences de la Terre, Strasbourg, France
Pages: 3-19
Published: 201501
Text Language: English
Summary Language: French
Publisher: Societe Geologique de France, Paris, France
References: 41
Accession Number: 2015-021868
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 8 tables, sketch maps
N42°30'00" - N51°00'00", W05°00'00" - E08°30'00"
Secondary Affiliation: Commissariat a l'Energie Atomique et aux Energies Alternatives, FRA, FranceUniversite de Nantes, FRA, FranceUniversite de Nice-Sophia-Antipolis, FRA, FranceUniversite Paul Sabatier, FRA, FranceObservatoire Midi-Pyrenees, FRA, FranceObservatoire de la Cote d'Azur, FRA, FranceCentre Sismologique Euro-Mediterraneen, FRA, FranceUniversite Joseph Fourier, FRA, FranceUniversite de Bretagne Occidentale, FRA, France
Country of Publication: France
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Societe Geologique de France. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201511
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