GILLI , Eric

International audience

Monaco is a medium seismicity zone. The Cave of Observatoire, a well decorated show cave, is a good place for paleoseismicity studies. On the floor of the cave it is possible to observe a great number of collapsed sodastraws. The breakages are attributed to the 1887 ligurian earthquake. A bore hole in a flowstone shows several levels of...

International audience

The main galeries of the Abel sinkhole near Grasse (Alpes Maritimes - France) are developped along a main thrust fault. The study of speleothems proves clearly a recent movement of this fault. The fractures indicate a north-south movement, they are not fossilised by new calcite. A large rock placed under the fault plane rotated during the...

Salinity measurements were used to detect and study submarine springs on the coast of southeastern France. Among them, the Cabbé-Massolins spring drains karstic formations in Arc de Nice (Alpes Maritimes, France). A salinity probe was placed in a spring. A comparison between the salinity variations and rainfall recorded at different...

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International audience

International audience

no abstract

International audience

Several caves were visited in different parts of the western USA to observe speleothems that could have been affected by ancient earthquakes. There are very few caves in California. In Arizona, it seems possible to find evidences of the Sonora 1887 earthquake in Sutherland Peak cave. In New Mexico, the caves of Guadalupe Mountain contain many...

Emblème de la région marseillaise, le massif côtier des Calanques abrite les importantes rivières souterraines de Port Miou et du Bestouan. Ces sources karstiques émergent au pied des falaises calcaires du Crétacé supérieur, à quelques mètres de profondeur sous le niveau marin. Les gigantesques galeries souterraines qui se développent en amont...

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L'hydrogéologie, science de l'eau souterraine, a pour objectif de planifier au mieux l'exploitation des ressources en eau. Elle doit donc identifier des aquifères ou nappes d'eau souterraine, mais elle doit, surtout aujourd'hui, protéger et gérer les ressources en eau. L'hydrogéologie, c'est aussi connaître et prévenir les sinistres lors de...

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Water is indispensable to life, and the human body cannot do without it for more than two days. While historically it was abundant and freely available and plentiful, potable water is becoming a more and a more a scarce commodity, and increasing unequally distributed. The 20th century saw the transition from water gathering to water...

no abstract

International audience

Eight caves have been investigated near Saint-Paul-de-Fenouillet after the magnitude 5.2 earthquake of February 1996 which occurred in the Eastern Pyrenees (France) and caused moderate damage at the ground surface. The earthquake has been associated with the movement of a E-W fault. The caves were not visited since the earthquake. Some damage,...

International audience

The astronomical and geodetic observatory OCA, located on the karst plateau of Calern (Caussols, France), has been monitoring earth deformation for several years. Two long baseline tiltmeters have been installed in a shaft in 2007, along with classical hydrogeological monitoring tools in order to investigate the relationship between current...

no abstract