[S23-P] Poster

[S23-P-10] ENGINEERING GEOLOGICAL APPROACHES TO DEAL WITH GEOHAZARD ASSESSMENT IN SEISMIC TERRITORIES

^○Mario Luigi Rainone¹, Giovanna Vessia¹, Carla Weaver² (1."G. d'Annunzio" University of Chieti-Pescara, Italy, 2.Department of Geological Sciences, California State University, Long Beach (CA))

The Engineering geological studies carried out in seismic territories are mainly focused on the assessment of co-seismic hazards. They consist on the following issues: 1)Site effects due to strong motion seismic events; 2)Liquefaction potential calculation and its numerical prediction; 3)Dynamic characterization of soil and rock mass behavior through lab and in situ experimental campaigns; 4)Seismically induced landslides in soil slopes. Several approaches and methods can be used to tackle the preceding issues commonly taking place contemporarily at a site. Thus, at those sites where strong earthquakes (with Local Magnitude ML>5) occur multiple hazard scenarios must be considered, according to the recent experiences developed in 2009 L'Aquila earthquake, 2010 Canterbury earthquake and 2012 Emilia Romagna earthquake. For addressing these types of studies multiple types of tools must be performed both through experimental and numerical approachesGeophysicists, geologists, geotechnical engineers are needed to combine expertise and scientific knowledge to contribute to understanding the complex interdependency among simultaneous effects induced by natural phenomena, such as the elastic wave propagation from seismic sources placed in the crust.In this contribution, the first issue of the list is considered. Local seismic response is strongly affected by the surface geo-lithological characters and geometrical setting of sediments overlapping the seismic “bedrock" (Vessia and Russo 2013, D'Intinosante and Vessia 2014). This is especially true in “near field areas" (Vessia et al. 2011, Vessia et al. 2016) that is the main character of the Italian Strong Motion seismic events causing heavy economic losses and several casualties. As an example, the case study of Casentino district (L'Aquila province, Italy) is hereafter considered to show how multidisciplinary tools are combined within engineering geological approaches to draw amplification maps at urban scales.