کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4741631 | 1641512 | 2014 | 10 صفحه PDF | دانلود رایگان |
• We present a site effect study for the city of Izmir, Western Anatolia, Turkey.
• Local amplification was evaluated using state-of-practice tools.
• The records of ten earthquakes recorded at 16 sites were analyzed with different methods.
• Seismic noise records were also used to estimate site effects.
• The different estimates are in good agreement among them.
We present a site effect study for the city of Izmir, Western Anatolia, Turkey. Local amplification was evaluated using state-of-practice tools. Ten earthquakes recorded at 16 sites were analysed using spectral ratios relative to a reference site, horizontal-to-vertical spectral ratios, and an inversion scheme of the Fourier amplitude spectra of the recorded S-waves. Seismic noise records were also used to estimate site effects. The different estimates are in good agreement among them, although a basic uncertainty of a factor of 2 seems difficult to decrease. We used our site effect estimates to predict ground motion in Izmir for a possible M6.5 earthquake close to the city using stochastic modelling. Site effects have a large impact on PSV (pseudospectral velocity), where local amplification increases amplitudes by almost a factor of 9 at 1 Hz relative to the firm ground condition. Our results allow identifying the neighbourhoods of Izmir where hazard mitigation measurements are a priority task and will also be useful for planning urban development.
Journal: Physics of the Earth and Planetary Interiors - Volume 229, April 2014, Pages 88–97