Engineering geologic assessment of the slope movements and liquefaction failures of the 23 October 2011 Van earthquake (M-w=7.2)

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NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, vol.13, no.4, pp.1113-1126, 2013 (SCI-Expanded) identifier identifier


On 23 October 2011, a M-w = 7.2 earthquake occurred in the Van Province in eastern Turkey, killing 604 people. The earthquake was triggered by a thrust fault due to a compression stress in the region, and caused extensive damage over a large area. Many structures in the earthquake region collapsed, and the damage spread from the city of Van to the town of Ercis, in a distance of 60 km. The earthquake generated several slope movements and liquefaction failures in the region, and this study evaluates these processes from the perspective of engineering geology, and presents field and laboratory results related to these processes. Attenuation relationships were used for estimation of peak ground accelerations (PGAs), and an empirical liquefaction evaluation method employing ground accelerations was used to define threshold accelerations initiating the liquefaction.