Abstract:

On 31 July 2005, at 00:45 local time, there was a strong earthquake in the Bala district of Ankara and its associated towns and villages. The earthquake began in the region and the earthquake continued intensely on the same day, and about 40 slight earthquakes of magnitude M=2.6-3.6 occurred until the morning. 31 July Bala earthquake's outer center is about 12 km from the Bala district of Ankara. The southern part of the town is nearby. The outer center of the earthquake was strongly felt in Ankara and its surroundings because it was very close to the province of Ankara. Although there were no deaths in the earthquake, especially in the district of Bala connected Sarıpınar, Bahçekaradalak, in the village of Yeniyapanşeyhli, woods occurred. 20 December 2007 by local time at 11:48 pm Mw=5. The event began with a earthquake of magnitude 5 and continued with a earthquake of magnitude MW=5.3 at 01:47 local time on December 27th. The outskirts of the earthquakes, the Afşar district is nearby, the Sarıpınar village is nearby, the distribution of damage in the region is also confirmed. In the Afshar district and nearby villages, about 500 buildings of crab housing have been seriously damaged. The area is generally the inner deformation area of the Anadolu Block and there are active wire breaks and these breaks produce earthquakes of medium size. The structure of the earthquake in the area is in the form of "Seasons of earthquake", and depending on the length and quantity of the active benefits in the area, the size of the earthquake generally is between M=4.7-5.7. The mechanisms of exploitation of earthquakes have been determined using the data of the numerous broadband (BB) earthquake stations of the Kandilli Rasathanesi and the Earthquake Research Institute (KOERI) with the Moment Tensor Solution Technology. The exploitation mechanisms indicate that the earthquake activity in the area is generally linked with the effect of the cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross-cross. The distribution of earthquakes also supports this result. We can describe the earthquake activity in the region for 3 years as the Afshar-Bala (Ankara) series of earthquakes. Each of the three earthquakes and about 2,000 small earthquakes that followed them had little number of injuries while there were no deaths during. Keywords: Inboard earthquake, increasing shocks, moment tensor solution, stretching tensor