LARROQUE , C.

L'actualité (séisme de l'Aquila, avril 2009) démontre que l'aléa sismique en domaine à faible déformation doit être pris en compte en dépit de la complexité du problème. Compte tenu des conditions assez générales dans ces domaines (sismicité diffuse, héritage structural important, faible vitesse de glissement sur les failles, séismes forts très...

Geologiya i Geofizika, v. 44, n. 4, p. 373-379 [605], 2003

International audience

Early in the morning of 1887 February 23, a damaging earthquake hit the towns along the Italian and French Riviera. The earthquake was followed by a tsunami with a maximum run-up of 2 m near Imperia, Italy. At least 600 people died, mainly due to collapsing buildings. This 'Ligurian earthquake' occurred at the junction between the southern...

Terra Nova, v. 16, n. 5, p. 265-272, 2004. http://dx.doi.org/10.1111/j.1365-3121.2004.00565.x

We present here new data from the MALISAR surveys that focus on two areas of the northern Ligurian margin where we reveal recent and active deformation. A set of N60°E scarps that are oblique to the margin is seen at the foot of the continental slope. These correspond to cumulated reverse-strike slip faulting that is consistent with the...

Soil Dynamics and Earthquake Engineering, vol. 17, pp. 475-484, 1998

Tectonophysics, v. 467, n. 1-4, p. 22-34, 2009. http://dx.doi.org/10.1016/j.tecto.2008.12.013

Geophysical Research Letters, v. 30, n. 15, p. 1782, 2003. http://dx.doi.org/10.1029/2003GL017171

Le 11 novembre 2019, un violent séisme de magnitude 5,4 sur l'échelle de Richter a secoué le sud de la France, fait trembler l'Ardèche et frémir Marseille comme Montpellier, faisant quatre blessés. L'épicentre, situé près de la ville du Teil, dans la vallée du Rhône, correspond à une zone densément peuplée avec de nombreuses installations...

Plusieurs failles actives sont identifiées à la jonction Alpes – Bassin Ligure : des failles dont la longueur est de l'ordre de la dizaine de kilomètres à terre (Faille de Blausasc, Faille de Donareo, Faille de Saorge-Taggia) et en mer le système de faille nord Ligure dont la longueur totale atteint 80 km. La géométrie et la cinématique de ces...

Le séisme de Peille (Mw=3,4) s'est produit le 1er novembre 1999, à 15 km au nord des villes de Nice, Monaco et Menton. Ce petit séisme a été très bien enregistré par 20 stations sismologiques, situées entre 6 et 50 km de l'épicentre. Nous avons utilisé une méthode de localisation non linéaire, qui montre que ce séisme a eu lieu à faible...

The Sayan fault is located at the boundary between the northernmost mountain belt of Central Asia (the Sayan- Baikal ranges) and the Siberian platform. This outstanding 500 km crustal structure defines an obvious and sharp morphotectonics feature easily recognizable on satellite imagery. Inherited from the Palaeozoic orogenes, the Sayan fault...

International audience

The lower Var valley is the only large outcropping zone of Plio-Quaternary terrains throughout the southwestern Alps. In order to assess the seismic hazard for the Alps - Ligurian basin junction, we investigated this area to provide a record of earthquakes that have recently occurred near the city of Nice. Although no historical seismicity has...

Terra Nova, v. 14, n. 6, p. 491-500, 2002. http://dx.doi.org/10.1046/j.1365-3121.2002.00445.x

National audience

A new seismically active zone is found in the southern part of the Ligurian basin, 80-km west of Corsica (western Mediterranean). The activity began in February 2011 with a foreshock (ML 4) and a mainshock (ML 5.3) 5 days later, followed by numerous aftershocks. We first analyze the fore- and mainshock in detail. We compare the results obtained...

The Sayan and Tunka faults are located at the boundary between the northernmost mountain belt of Central Asia (the Sayan-Baikal ranges) and the Siberian platform. These prominent crustal structures were involved in the opening of the southern Baikal rift system since the beginning of the Cenozoic and define large-scale sharp morphotectonic...

International audience

The dating of the uplift onset of the Mongolian mountain ranges, the northernmost relief associated with the India-Eurasia convergence, is a fundamental issue to better understand the mechanisms of propagation of the Cenozoic transpressive deformation in Central Asia. Using apatite fission tracks we determined the timing and strain rates of the...