Monitoring of the Micro-seismic Activity along the Salt Lake Fault Zone: Central Anatolia

2. INTRODUCTION 3. METHOD In the frame of this project micro-earthquake activity of Salt Lake (Central Anatolia) region has been monitored and analyzed in detail by using the 6 broadband stations installed during this project together with the stations operated by Kandilli Observatory and Earthquake Research Institute (KOERI). In order to determine the earthquake parameters and focal mechanism parameters a program called ZSacWin (Yilmazer, 2003) which is routinely used in National Earthquake Monitoring Center (NMEC), KOERI has been used. Determination of the earthquake parameters were based on HYPO71 and HYPODD, computation of focal mechanism parameters were based on CMT (Centroid Moment Tensor) TDMINV (Time Domain Moment Tensor Inversion) in this program. HYPO, earthquake parameter determination program, which is used in important international seismology centers is also used in KOERI-NEMC since 1992, successfully. The crust and velocity model computed for Turkey (Kalafat et al., 1987) has been used in the solution of earthquakes. Data transmission to NEMC from those 6 stations which is installed in the frame of this project has been performed by GPRS communication in real time. P and S readings of all the stations in the region have been used for the determination of earthquake epicenter. RMS < 0.4, distance error < 1 km and depth error < 0.5 km, seismic station gap < 65 were selected for the solution of earthquakes especially after the installation of additional stations in 2009. Fault mechanism solutions and stress tensor analysis and statistical studies performed in this region were collected from these and earlier (Kalafat et al., 2009; Kalafat, 2010) studies.