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[Observatoire Gravitaire Géoazur] The Gulf of Corinth
The Gulf of Corinth

Research Studies by T. Lebourg, S. El Bedoui, A. Deschamps and Y. Guglielmi, Geoazur, UNS, Nice, France.

The Gulf of Corinth (Greece) is the most active continental rift in Europe, with a displacement rate of 16 mm yr-1 (P. Briole et al, 2000).

It is a N120 striking graben constituted by E-W extensive faults dipping 50/70° to the gulf centre (T. Doutsos and G. Poulimenos, 1992), connected by N-S transfer zone (N. Flotté et al, 2005). The E-W faults recognized at the surface are constrained in depth by seismic tomography (D. Latorre et al, 2004), showing a hypothetical horizontal ramp connection reaching 4 to 10 km deep, from the South to the North (A. Rigo et al, 1996).

Due to the high seismic activity, the coast is affected by a very high landslide hazard. I.K. Koukouvela and T. Doutsos, 1997, and C. Galloussi and I.K. Koukouvelas, 2007 showed a clear link between active faults and the location of landslides along the northern and the southern coasts. More generally, these links between the two phenomena are related to:

- the ground shaking during seismic activity,
- the landscape modification associated with surface offsets, which could allow an equilibrium loss,
- the structural network.

The Panagopoula landslide (southern coast) and the Sergoula landslide (northern coast) are both presented in the section.