DOI: 10.5176/2251-3353_GEOS16.22
Authors: Fadime Sertçelik, T.Serkan Irmak, Hamdullah Livaoğlu, Evrim Yavuz, İbrahim Sertçelik, Cengiz Kurtuluş
Abstract: Ankara, the capital city of Turkey has been suffered by serious terrorist attack in last six months in 2015-2016 resulted 170 death and 685 injuries. These blasts produced seismic signals which were recorded by three broadband instruments; ODTU, ANTO and LOD. Analysis of the seismic signals show that, (1) the first blast could not generate enough radiated energy to analysis because of less amount explosive materials carried by two suicide bombers, (2)the second event was a massive single event causedby a car loaded bomb, (3) the third event consists oftwo blast with 0.3 sec time interval caused by a carbomb and the car bomb was moving north-southdirection just before explosion. The results of shorttime Fourier analysis indicate that the energy releasesfocused at higher frequencies around 13-25 Hz. Eventhough most of energy radiated to atmosphere as thehealing energy, calculating energy amount usingseismic signals suggest that 1.04e+7, 4.21e+7 and8.16e+7 joule energy radiated in crust for 10 October,2015, 17 February, 2016 and March 13, 2016 attacks,respectively.
Keywords: Spectral analysis; Ankara; blast, Short Time Fourier Transform
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