Status of Seismic Hazard Modeling of Active Faults in Oran City, (Northwestern Algeria)

Abstract

This work, as a stage of the collaborative project Smarter between CRAAG and FEUP, aiming to mitígate the seismic risk in Oran city, leading to update the seismic design regulations, will address some recent progresses and considerations made toward a further improvement of the component of seismic risk related to the probabilistic quantification of seismic hazard. The study focuses on the case of Oran city, where several identified active faults are modeled, and their characteristic parameters are turned as input to probabilistic seismic hazard. Site-specific seismic hazard analysis is then performed at Oran, and the derived results are presented in terms of different ground motion parameters, i.e., PGA and uniform hazard spectra (UHS) for a return period of 475 years. Moreover, seismic disaggregation for the same return period is performed to derive the contribution of the different seismic scenarios. Also, based on these results, we compute the so-called control earthquake, that is, the most contributing earthquake to seismic hazard at Oran city from a probabilistic point of view.