Akademik Veri Yönetim Sistemi
Yerbilimleri/ Earth Sciences, cilt.33, sa.2, ss.131-150, 2012 (Scopus)
In this study, a new crustal model of one-dimensional (1-D) seismic wave velocity for Ankara and surroundings was produced by using local earthquake data. The earthquake data was recorded by a temporary local seismic station network which was established to monitor the current seismicity of the region. Ankara Earthquake Monitoring Network (AnkNET) consisting of 6 broad-band seismographs has collected data from 2007 until 2010. The earthquake activity of the region was monitored, earthquake location parameters were determined and the crustal seismic wave velocity was investigated using the data recorded by the AnkNET stations. The largest part of the data set takes its source from the local active faults in Bala. Even though the homogeneous distribution of stations of AnkNET is eligible for determining 1D seismic velocity model they are insufficient in number. So, the use ofadditional records of different stations was needed. Therefore, data from the close stations of Kandilli Observatory and Earthquake Research Institute (KOERI) of Boǧaziçi University was also usedin the research. 2955 P- and S-seismic wave phases were used in 1D velocity model estimation. Earthquake foci used in this study are located within the first 30 km depth. This situation limits the solution depth of the seismic velocity structure. The resulting crustal 1D P- and S-wave velocity model of the upper 30 kilometers consists of an 8 km thick upper layer with 5.25 km/s P-wave velocity. The P-wave velocities of the lower layers are increasing with depth reaching 6.47 km/s at 30 km.