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Journal Article

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

Michel Cara, Yves Cansi, Antoine Schlupp, Pierre Arroucau, Nicole Béthoux, Eric Beucler, Stéphane Bruno, Marie Calvet, Sébastien Chevrot, Alexandra Deboissy, Bertrand Delouis, Marylin Denieul, Anne Deschamps, Cécile Doubre, Julien Fréchet, Stéphanie Godey, Olivia Golle, Marc Grunberg, Jocelyn Guilbert, Méric Haugmard, Liliane Jenatton, Sophie Lambotte, Delphine Leobal, Christophe Maron, Véronique Mendel, Sophie Merrer, Marie Macquet, Arnaud Mignan, Antoine Mocquet, Marc Nicolas, Julie Perrot, Bertrand Potin, Olivier Sanchez, Jean-Paul Santoire, Olivier Sèbe, Matthieu Sylvander, François Thouvenot, Jérôme Van Der Woerd, Katia Van Der Woerd
Published: 01 January 2015
Bulletin de la Société Géologique de France (2015) 186 (1): 3–19.
DOI: https://doi.org/10.2113/gssgfbull.186.1.3
... Thouvenot; Jérôme Van Der Woerd; Katia Van Der Woerd Abstract The aim of the SI-Hex project (acronym for « Sismicité 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...
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<span class="search-highlight">SI</span>-<span class="search-highlight">Hex</span> magnitudes M w of earthquakes located outside the <span class="search-highlight">Si</span>-<span class="search-highlight">Hex</span> zone and f...

SI-Hex magnitudes M w of earthquakes located outside the Si-Hex zone and f...

Published: 01 January 2015
Table VIII SI-Hex magnitudes M w of earthquakes located outside the Si-Hex zone and felt with EMS-98 macroseismic intensity I≥IV.
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Short-period seismic stations contributing to the <span class="search-highlight">SI</span>-<span class="search-highlight">Hex</span> backbone catalogue...

Short-period seismic stations contributing to the SI-Hex backbone catalogue...

Published: 01 January 2015
Fig. 1 Short-period seismic stations contributing to the SI-Hex backbone catalogue in two periods: a) [1962–1977]; and b) [1998–2005]. Red triangles are stations used in the hypocentre localization during indicated period and yellow triangles show the stations no longer active after 1997.
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Example of RMS precision of the computed epicentre location in the <span class="search-highlight">SI</span>-<span class="search-highlight">Hex</span> b...

Example of RMS precision of the computed epicentre location in the SI-Hex b...

Published: 01 January 2015
Fig. 2 Example of RMS precision of the computed epicentre location in the SI-Hex backbone catalogue. For each event, the radius of the circle with an area equal to the standard deviation ellipse is calculated. Precisions shown here correspond, for each 0.1°× 0.1° pixel, to the averaged circle
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Map of identified artificial seismic events in the <span class="search-highlight">SI</span>-<span class="search-highlight">Hex</span> extended zone.

Map of identified artificial seismic events in the SI-Hex extended zone.

Published: 01 January 2015
Fig. 14 Map of identified artificial seismic events in the SI-Hex extended zone.
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Instrumental seismicity in metropolitan France. (a) Map of the extended <span class="search-highlight">SI</span>-...

Instrumental seismicity in metropolitan France. (a) Map of the extended SI-...

Published: 20 July 2020
Fig. 2 Instrumental seismicity in metropolitan France. (a) Map of the extended SI-Hex catalogue (1962–2018). Colored circles indicate earthquake magnitudes Mw. (b) Number of recorded earthquakes per year. (c) Cumulative magnitude-frequency distribution of seismicity. Solid circles: Instrumental
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Seismicity 1962–2009 of metropolitan France and the surrounding marine excl...

Seismicity 1962–2009 of metropolitan France and the surrounding marine excl...

Published: 01 January 2015
Fig. 15 Seismicity 1962–2009 of metropolitan France and the surrounding marine exclusive economic zone extended 20 km away to account for maximum location uncertainty (SI-Hex-zone). Coloured symbols show the epicentres located either within the SI-Hex zone, or abroad but felt with EMS-98
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French metropolitan seismicity 1962–2009. (a) Magnitude as a function of ti...

French metropolitan seismicity 1962–2009. (a) Magnitude as a function of ti...

Published: 25 September 2018
Figure 1. French metropolitan seismicity 1962–2009. (a) Magnitude as a function of time. (b) Frequency size distribution of all events (SI‐Hex database, Cara et al. , 2015 ).
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Number of events identified as known earthquake (“ke”), unknown (“uk”) and ...

Number of events identified as known earthquake (“ke”), unknown (“uk”) and ...

Published: 01 January 2015
Table VI Number of events identified as known earthquake (“ke”), unknown (“uk”) and known mine (“km”) by four major contributors to the original SI-Hex database and related percentage.
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Number of events per magnitude range and time periods. The M w magnitude r...

Number of events per magnitude range and time periods. The M w magnitude r...

Published: 01 January 2015
Table VII Number of events per magnitude range and time periods. The M w magnitude ranges correspond to the main divisions of the procedure used for computing the SI-Hex magnitudes. The time periods correspond to the main steps in the recording procedures (paper, analog magnetic tapes
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Example of regional earthquake coda waves recorded by the LDG 1-Hz vertical...

Example of regional earthquake coda waves recorded by the LDG 1-Hz vertical...

Published: 01 January 2015
Fig. 5 Example of regional earthquake coda waves recorded by the LDG 1-Hz vertical velocimetric sensor at station MFF. This M L-LDG = 5.7 event occurred on September 30, 2002, in the northwestern region near Lorient (M w = 5.3 according to Perrot et al. [2005] ; and M w = 5.2 from the SI
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Seismicity map for metropolitan France M 2.5, 1962–2009, and the 26 reservo...

Seismicity map for metropolitan France M 2.5, 1962–2009, and the 26 reservo...

Published: 25 September 2018
Figure 2. Seismicity map for metropolitan France M 2.5, 1962–2009, and the 26 reservoir locations we use in this study. Small gray circles are M 2.5–3.9 earthquakes. Large circles are M 4 and above earthquakes. The earthquake catalog is from the SI‐Hex database ( Cara et al. , 2015 ). Triangle
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Four zones of preferential location solutions of the 2014 version of the <span class="search-highlight">SI</span>...

Four zones of preferential location solutions of the 2014 version of the SI...

Published: 01 January 2015
Fig. 3 Four zones of preferential location solutions of the 2014 version of the SI-Hex catalogue (inset 3a); 3b: Alpine zone (Sismalp, Grenoble); 3c: Mediterranean zone (Geoazur, Nice); 3d: Pyrenees zone (OMP, Toulouse). Geoazur solution is preferred in the overlapping area between zones b) and c
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Regional attenuation parameters β 1 and β 2 used to model the coda envelo...

Regional attenuation parameters β 1 and β 2 used to model the coda envelo...

Published: 01 January 2015
Table V Regional attenuation parameters β 1 and β 2 used to model the coda envelopes when both the stations and the epicentre are located in one of the four SI-Hex regions. For the stations located in the central region (yellow triangle in figure 4 ), unique values of ß1 and ß2 are used
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Relationship between structural inheritance and seismicity in metropolitan ...

Relationship between structural inheritance and seismicity in metropolitan ...

Published: 20 July 2020
, SI-Hex catalogue).
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Orthogonal linear regression between M L-LDG and M w from Godano et al....

Orthogonal linear regression between M L-LDG and M w from Godano et al....

Published: 01 January 2015
of the relationship used in SI-Hex for intermediate magnitudes (3.117 ≤ M L-LDG ≤ 4).
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Plot of average (Al,<span class="search-highlight">Si</span>)-O distance vs. site occupancy fraction of <span class="search-highlight">Si</span> in (Al...

Plot of average (Al,Si)-O distance vs. site occupancy fraction of Si in (Al...

Published: 01 August 2011
) ratio. Ca-Hex: CaMg 2 Al 6 O 12 hexagonal aluminous phase ( Miura et al. 2000 ), K-Hex: K 1.00 Mg 2.00 Al 4.81 Si 1.13 O 12 hexagonal aluminous phase (this study), Na-Hex: Na 1.04 Mg 1.88 Al 4.64 Si 1.32 O 12 hexagonal aluminous phase (this study), Mg-Cf: MgAl 2 O 4 calcium ferrite ( Kojitani et al
Journal Article

Topotactic and reconstructive changes at high pressures and temperatures from Cs-natrolite to Cs-hexacelsian

Huijeong Hwang, Donghoon Seoung, G. Diego Gatta, Douglas A. Blom, Thomas Vogt, Yongjae Lee
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1562–1567.
DOI: https://doi.org/10.2138/am-2015-5090
... 1.548 Si 6.452 O 16 (Cs-HEX) with a hexacelsian framework forms, which has a ca. 1.8% smaller unit-cell volume per 80O f . This phase can be recovered after pressure release. The structure of the recovered Cs-HEX has been refined in space group P 6 3 / mcm with a = 5.3731(2) Å and c = 16.6834(8...
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Journal Article

Crystal symmetry and chemical composition of yukonite: TEM study of specimens collected from Nalychevskie hot springs, Kamchatka, Russia and from Venus Mine, Yukon Territory, Canada

O. Nishikawa, V. Okrugin, N. Belkova, I. Saji, K. Shiraki, K. Tazaki
Published: 01 February 2006
Mineralogical Magazine (2006) 70 (1): 73–81.
DOI: https://doi.org/10.1180/0026461067010314
... distributions in electron diffraction indicate that most plates of yukonite at Nalychevskie hot springs have orthorhombic symmetry, but some are hexagonal with a hex = 11.3 Å. The orthorhombic cell is C-centred with a orth = √3 a hex , b orth = a hex . High-resolution images of edge-on mounts indicate...
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Figure 1. Log K values for hydrolysis of GeO 2(<span class="search-highlight">hex</span>) and SiO 2 , and Ge&#x2F;S...

Figure 1. Log K values for hydrolysis of GeO 2(hex) and SiO 2 , and Ge/S...

Published: 01 November 2002
Figure 1. Log K values for hydrolysis of GeO 2(hex) and SiO 2 , and Ge/Si fluid (μmol/mol) of fluid in equilibrium with Ge-bearing quartz (1.2 ppm Ge) as function of temperature. Experimental data (filled circles) for GeO 2(hex) solubility are from Pokrovski and Schott (1998) .