Earthquake-induced coastal sediment instabilities in the western Gulf of Corinth, Greece

Hasiotis, T; Papatheodorou, G; Bouckovalas, G; Corbau, C; Ferentinos, G

dc.contributor.author	Hasiotis, T	en
dc.contributor.author	Papatheodorou, G	en
dc.contributor.author	Bouckovalas, G	en
dc.contributor.author	Corbau, C	en
dc.contributor.author	Ferentinos, G	en
dc.date.accessioned	2014-03-01T01:17:45Z
dc.date.available	2014-03-01T01:17:45Z
dc.date.issued	2002	en
dc.identifier.issn	0025-3227	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14647
dc.subject	Coastal instabilities	en
dc.subject	Geotechnical characteristics	en
dc.subject	Gulf of Corinth	en
dc.subject	Liquefaction analyses	en
dc.subject	Mass flows	en
dc.subject	Slope stability	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.classification	Oceanography	en
dc.subject.other	Gravitational stresses	en
dc.subject.other	Deformation	en
dc.subject.other	Liquefaction	en
dc.subject.other	Sediments	en
dc.subject.other	Stress analysis	en
dc.subject.other	Earthquakes	en
dc.subject.other	coastal sediment	en
dc.subject.other	earthquake	en
dc.subject.other	liquefaction	en
dc.subject.other	slope failure	en
dc.subject.other	slope stability	en
dc.subject.other	Mediterranean Sea	en
dc.title	Earthquake-induced coastal sediment instabilities in the western Gulf of Corinth, Greece	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0025-3227(02)00240-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0025-3227(02)00240-2	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	On June 15 1995, a locally 6.2-R destructive earthquake occurred in the western Gulf of Corinth and caused extensive onshore and offshore sediment instabilities. A detailed offshore geophysical survey along the Tolofonas/Eratini coastline, soon after the earthquake, revealed the existence of two major sediment failures affecting the surficial 8 and 2 m of the recent sedimentary cover. The sizes of the two sediment failures are approximately 200000 and 50000 m(2). The geotechnical study has shown that (1) the coastal sediments are stable under gravitational stresses and cyclic loading stresses induced by the 6.2-R earthquake and (2) the sediment failures were initiated due to liquefaction of subsurface layers. The failed sediments very quickly disintegrated and transformed to mass flows. The deformation of the failed sediment was caused by loss of sediment strength due to development of high pore water pressure induced by the earthquake. The study suggests that the alluvial fan deposits along the coastal zone of the western Corinth Gulf are susceptible to liquefaction by any earthquake event with a magnitude greater than 6 R, depending upon the proximity of the site to the earthquake epicenter. Earthquakes of magnitude 6 R are expected to occur every 22.7 years and therefore the recurrence interval for sediment failure events is about the same. (C) 2002 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Marine Geology	en
dc.identifier.doi	10.1016/S0025-3227(02)00240-2	en
dc.identifier.isi	ISI:000177362800008	en
dc.identifier.volume	186	en
dc.identifier.issue	3-4	en
dc.identifier.spage	319	en
dc.identifier.epage	335	en