Analysis of the strong motion data associated with normal fault mechanism earthquakes in Turkey

摘要

Strong motion data associated with the main-shock and after-shocks of the 1995 Dinarand 1997 Antakya, Turkey earthquakes have been analyzed to investigate the source, attenuationand site response parameters. Both earthquakes resulted from predominantly normal faulting.Dinar earthquake (Mw=6.0, USGS) occurred on October 1, 1995 causing casualties and physicaldamage (Io=VII-VIII MSK). The PGA in Dinar was 0.33g. The main-shock of the Antakya earthquaketook place on January 22, 1997 (Mw=5.8). Limited physical damage (Io=VI-VII MSK) wasconcentrated in the Hatay province. The PGA in Antakya was 0.15g. For both earthquakes, strongmotion data were baseline corrected, local magnitudes were computed and anelastic attenuation parameters,seismic moments and corner frequencies were assessed. It is believed that the obtaineddata will complement the relatively scarce earthquake data associated with extensional regimes.