Estimation of the spectral attenuation factor κ in the vicinity of the seismic station located in Fabra Observatory

Abstract

Characterisation of the attenuation experienced by a wavefield along the source-station path and at the station-site itself, is an essential part of ground-modelling and seismic hazard assessment. Hence, this project aims to obtain an estimation of the spectral attenuation parameter in the local area of Fabra Observatory (Barcelona). Especially the site-specific component κ0. The analysis was performed following Anderson and Hough’s method (1984). Moreover, taking into account the spatial distribution of the earthquakes present in the created database, we also evaluated κ variability relative to the azimuthal distribution