Microtremor measurements for the microzonation of Dinar

The geotechnical site conditions in Dinar town located in western Turkey we re investigated after the 1995 Dinar earthquake based on borings, in situ p enetration tests, seismic wave velocity measurements, and microtremor recor ds. The variation of damage distribution within the town was evaluated with respect to 23 district damage ratios calculated, based on the detailed dam age survey conducted by the General Directorate of Disaster Affairs. Site a mplifications were estimated from microtremor spectral ratios and microzona tion was performed using a GIS methodology. The results of in situ penetrat ion tests and seismic wave velocity measurements as well as the damage dist ribution were compared with the amplification zonation obtained from microt remor records. The results indicate the applicability of microtremor spectr al ratios for assessing the local site conditions and site amplifications.