A novel probabilistic methodology for regional seismic site characterization is proposed and applied to a region with highly heterogeneous surficial geology varying soil sediment thickness stiffness. The method combines various sources of geological geotechnical uncertainties develop three-dimensional (3D) shear-wave velocity ( V s ) model evaluate the associated uncertainties. 3D unconsolidate...

Abstract. Past seismic events worldwide demonstrated that damage and death toll depend on both the strong ground motion (i.e., source effects) local site effects. The variability of earthquake distribution is caused by stratigraphic and/or topographic setting buried morphologies (e.g., irregular sub-interface between soft stiff soils) can give rise to amplification resonances with respect expec...

In the municipality of Enna, 80 HVSR measurements were performed, and some these combined with MASW seismic measurements, which made it possible to constrain data inversion obtain significant shear wave velocity models. A reconstruction depth bedrock was performed for whole territory, showing different depths higher lower areas, as evidenced also by Vseq parameter map. The frequency peaks ident...

A microzonation study deals with the classification of hazards in a town or city terms surface ground motions that result from amplification and resonance frequency soils against seismic tremors. This paper presents peak amplitude for Lahore city, Pakistan. In order to recognize local soil effects covered geology at 159 sites horizontal-to-vertical spectral ratio (HVSR) Nakamura method was impl...

Being a country exposed to strong seismicity, the estimation of seismic hazard in Tajikistan is essential for urbanized areas, such as rapidly growing capital city Dushanbe. To ensure people’s safety and adequate construction work, detailed microzonation key proper planning. Existing estimations date back 1978; they are based on engineering geological investigations observed macroseismic data. ...

The analysis of ambient vibrations represents a valuable tool in seismic microzonation, engineering seismology, and other fields. An extensively used approach for the study of ambient vibrations is the use of array processing techniques. We have developed a novel technique for the analysis of the seismic wave field and show an application to the analysis of ambient vibrations. We derived maximu...

The possibility is here explored to use an ‘equivalent’ homogeneous configuration simulate 1D seismic response of heterogeneous engineering-geological bodies when relatively weak impedance contrasts internal the (it was assumed a shear wave velocity variation between alternating layers equal 150 m/s) only exist above bedrock. This equivalent obtained by considering Vs value harmonic average act...