Scenario-based seismic risk assessment in the city of Aigion (Greece)

Citation:

Giannaraki G, Kazantzidou-Firtinidou D, Kassaras I, Roumelioti Z, Ganas A, Karakostas C, Mourloukos S, Stoumpos P, Tsimi C. Scenario-based seismic risk assessment in the city of Aigion (Greece). 16th European Conf. on Earthq. Eng. (16ECEE) [Internet]. 2018.

Abstract:

A seismic risk model on a building block scale is presented for the earthquake prone city of Aigion (W. Corinth Gulf) by combining deterministic seismic hazard with Risk-UE LM1 structural vulnerability, assessed per building, taking into account site conditions approximated by Horizontal-to-Vertical-Spectral-Ratios (HVSR) from ambient noise. The stochastic finite-fault method has been applied to simulate strong ground motion from two close earthquake scenarios, capable of occurring within the seismotectonic frame of the area: (a) a repetition of the 1995, June 15 (Mw=6.4) devastating earthquake and (b) a repetition of the 1861, December 26 earthquake of Mw=6.7 on the East Heliki Fault (EHF). The applied methodology provided comparable pattern with the real damage distribution of the 1995 earthquake, highlighting outlooks toward earthquake preparedness and risk
mitigation purposes.

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