Continuous strain and tilt monitoring on the Trizonia Island, Rift of Corinth, Greece

• Published in: Comptes rendus Geoscience. Academie des Sciences, Paris Vol. 336; no. 4-5; pp. 313 - 323
• Main Authors: Bernard, Pascal, Boudin, Frédéric, Sacks, Selwyn, Linde, Alan, Blum, Pierre-Antoine, Courteille, Claude, Esnoult, Marie-France, Castarède, Hugues, Felekis, Stelios, Billiris, Harris
• Format: Journal Article Book Chapter
• Language: English; French
• Published: 01.03.2004
• Subjects: Marine; MED, Greece, Korinthiakos Gulf
• ISSN: 1778-7025; 1631-0713; 1778-7025
• DOI: 10.1016/j.crte.2003.11.015

Tilt and strain continuous monitoring started in October 2002 in the Trizonia Island, in the Gulf of Corinth, in order to detect possible strain transients in the rift. The hydrostatic tiltmeters, developed at IPGP, are 15 m long and buried in trenches at a depth of 2.5 m, with a few 10.9-radian noise level at short period. The strain is measured by a Sacks-Evertson dilatometer cemented in a borehole at a depth of 148 m, with a few 10.10 resolution at short period. A 1 h-lasting, 10.7-strain transient has been recorded on the dilatometer, possibly related to a seismic swarm that occurred 15 km away.Original Abstract: Des mesures continues de deformation et dainclinaison ont debute en octobre 2002 sur laile de Trizonia, dans le golfe de Corinthe, dans le but de detecter de possibles deformations transitoires dans le rift. Les inclinometres hydrostatiques, developpes a laIPGP, sont longs de 15 m et enterres dans des tranchees a 2,5 m sous terre, avec une resolution de quelques 10.9 radians a courte periode. La deformation est mesuree sur un dilatometre de type SacksuEvertson, cimente dans un forage a 148 m de profondeur, avec une resolution de quelques 10.10 a courte periode. Un signal daune heure de duree et daamplitude 10.7 a ete enregistre, peut-etre associe a un essaim sismique a 15 km de distance.