Günay Beyhan

City of Bingöl in May 2003: Assessment of strong ground motion records

The main shock of Bingöl earthquake (MW = 6.4) recorded by six accelerometers in the area occurred at 03:27 local time on May 1, 2003. The largest acceleration value of north–south component was recorded as 545.5 cm/s2 at the nearest station which it is 12 km away from the epicenter of earthquake. Especially, 0.15 s short period was observed when high spectral acceleration value occurred. An acceleration value greater than 50 gal was recorded at the BNG (Bingöl) station and structural damage occurred within 6.5 s was very important for the near source and strong ground motion seismology. The recorded peak acceleration values were greater than the estimated empirical acceleration values. However, the structural damage was not as high and widespread as expected. This occurrence was explained by considering the factors of earthquake source, frequency content, effective duration, effective acceleration value, local soil conditions, rupture direction and attenuation.

Interpretation of the Bouguer Gravity Data from Burdur Region using the Euler Deconvolution Technique

*** Summary This study aims to determine the depths of geological structures in Burdur region. For this purpose, Euler deconvolution was applied on two separate cross-sections of the region’s Bouguer gravity map. Euler deconvolution yields fast and successful results in determining the depths of graben-type tectonic structures. The depths of geological structures were determined through different window sizes and structural index values. The maximum depth value determined in the region was approximately 13 km. The determined depths were used to reveal crosssections of possible underground structures.