The Period and Amplification Map of Bartin by Means Ambient Noise Measurements

This paper describes the results of the study of ambient noise measurements at Bartın, which is located in Northwestern part of Turkey. Seismic noise measurements were carried out in the interested area at 200 sites. Short periods (less than 1 second) were taken into account at the main peak in the spectral ratio between the horizontal and the vertical components. Two maps showing the spatial variations of the predominant periods and seismic amplification according to Nakamura technique in the investigated area were drawn. The analysis results show that within the investigated area, Northern part of East-west trending Bartın creek and in additions to that Western and Eastern part of North-west trending Bartın creek have shown relatively high predominant periods and high seismic amplification. This result is well-adjusted with the geological effect on seismic amplification.