SEISMIC HAZARD ASSESSMENT AND DESIGN SPECTRA FOR THE KOZANI-GREVENA REGION (GREECE) AFTER THE EARTHQUAKE OF MAY 13, 1995

The Kozani-Grevena (Greece) destructive earthquake occurred in a regio n of low seismicity. A considerable amount of strong-motion data was a cquired from the permanent strong motion network of the Institute of E ngineering Seismology and Earthquake Engineering (ITSAK) as well as fr om a temporary one installed after the earthquake. On the basis of thi s data set as well as on the observed macroseismic intensities, local attenuation relations for peak ground acceleration and velocity are pr oposed. A posteriori seismic hazard analysis is attempted for the affe cted and surrounding areas in terms of peak ground acceleration, veloc ity, bracketed duration and spectral acceleration. The analysis shows that the event of May 13, 1995 can be characterized as one with a mean return period of 500 to 1000 years. Relying on the observed spectral- acceleration amplification factors and the expected peak ground accele ration for mean return period of 500 years, region-specific elastic de sign spectra for the buildings of the Kozani and Grevena prefectures a re proposed. (C) 1998 Published by Elsevier Science Ltd. All rights re served.