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Abstract: In this paper are presented the results of integrated investigations aimed at building a reference geological model for the seismic microzonation of Celano municipality (Central Italy). The study area is located along the northern rim of the Fucino basin, which is an intermontane half-graben filled by thick Plio-Quaternary alluvial and lacustrine deposits and is surrounded by Meso-Cenozoic limestone and Neogene sandstone relieves, with mean elevation around 1500m a.s.l., that also represent the bedrock units of the basin itself. Evidences of recent tectonic activity within the Fucino basin have been pointed out by several paleoseismological studies recently performed to better frame the effects of the seismogenic structures responsible for the Ms 7.0, 1915 Avezzano earthquake and other historical and prehistoric seismic events occurred in the area. On the basis of integrated site and laboratory investigations, such as surface geological surveys, borehole logging, isotope geochemical analyses based on 230Th/234U dating method, geotechnical investigation and hydrogeological prospecting, the geological model of the area was built. The identification of such model was fundamental in view of correct planning and development of further investigations and analyses, mainly based on geophysical methods and seismic response modelling, carried out by other research teams cooperating within the Celano seismic microzonation project. [Copyright &y& Elsevier]

Abstract: In this paper the results of the numerical analyses, related to a site of the Abruzzo Region (Celano-AQ), finalized to the evaluations of site effects, are shown. The aim of the work was to give a methodology and results that can be used in seismic risk analysis, at the level of urban planning. Therefore, a series of geologic, geomorphologic, geotechnical and geophysical analyses have been carried out to characterize the lithological units and to identify the areas affected by site effects. The expected seismic inputs are individuated and two-dimensional numerical analyses have been done. The results are presented in terms of elastic pseudo-acceleration spectra and amplification factors, computed as the ratio between spectral intensity of output and input, in the period ranges 0.1–0.5 and 0.1–2.5s. [Copyright &y& Elsevier]

Abstract: A quantitative prediction of seismic site effects requires the definition of a subsoil parametric model for ground motion numerical modelling. This paper describes an application of integrated geophysical methods to define an earthquake engineering parametric model for the seismic zonation of the municipal area of Celano, Italy. In municipal areas of such extent, particularly in case of complex geology, subsurface characterization is an optimization procedure, where the objective function to be minimized is the uncertainty related to the subsoil features, under the constraint of fixed resources and logistical limitations. In the particular case of Celano, correlation between different geophysical results was very profitable in discriminating different geological scenarios in the historical centre and in areas designed for urban expansion, while defining the elastic properties of the near-surface deposits throughout the municipal area. [Copyright &y& Elsevier]