Özet:

With the data provided by space geodesis techniques such as InSAR (Interferometric Sentez-Open Radar) and GNSS (Global Navigation Satellite System), a large number of models have been developed for the physical characteristics and reology of the upper cortex and other layers of litosphere. These models are again used in the InSAR studies for the intersismic period to approach earthquake forecasts. However, large earthquakes that dissolve tensions in any phy segment occur within a period of several hundred to several thousand years, while deformation observations that usually cover a period of ten years most represent a relatively small period of time in a complete earthquake circle. To use these short-term deformation observations in seismic danger, better models are needed on how the phy zones are deformed in space and time. Therefore, the InSAR studies, which focus on deformations around the main segments and other structural elements in tectonic basins and fiber zones and also address the relationship between the observed deformations and these structural elements, may be of great importance in terms of earthquake forecasts. In this context, in our article, we thought to evaluate the tectonic characteristics of the Erzincan pool located on the Northern Anadolu Fee (KAF), along with the defined deformation areas with the InSAR. In this regard, instead of the modern use of InSAR technology that covers very large fields and hundreds of interferogram analysis, we preferred the initial use of the ancient procedure in which the deformation fields determined by a small number of interferogram focused on the pool were evaluated in terms of structural geology. Two devastating earthquakes have occurred in the last century in the Erzincan tectonic collapse pool (1939, M: 7.8 - 8.2 and 1992, M: 6.8). Previous studies show that the pool was formed as a result of a check-in type opening along the KAF zone. The activity of the ovarian tree (OF) expands the pool. In the east of the pool there is a seismic space zone along the KAF at least 75 km. This seismic gap line is believed to consist of two main segments, Sansa, about 22 km long in the west and Yedisu, about 53 km long in the east. In our study, for an approximately 2.5 year post-sympic period (1993-1995) following the Erzincan earthquake (M = 6.8) on March 13, 1992, we compared the deformation areas determined in an interferogram produced by the differential interferometric SAR (DINSAR) technique from the SAR data of the ERS-1 satellite with the structural geological elements of the pool. The findings of interferometric deformation were manifested on tectonic lines near the edges of the Erzincan oval. The amounts of ground change that correspond to collapse in the vertical direction components are higher around the northern edge of the pool, than those on the southern edge. Thro the northern edge of the pool and the KAF zone, developing deformations in the northwest and north of the Erzincan city center are at a lower rate and levels compared to developing deformations in the east and northeast. This brings light on the development of transpressive zones and push-up structures in the relatively slowly falling northwest part, while both areas collapse together. In the interferogram, the development of deformation is not observed from the approximately east output of the Erzincan oval. Therefore, as we move to the east of the pool and approach the seismic empty zone, it is believed that the KAF segment shows a behavior that has lower switches. In our study, also, the 1939 Erzincan earthquake (M: 8. 0) Ekşisu (Erzincan) - An ancient field report with scientific-antiquity characteristics (Stchepinsky vd., 1940), which includes a map of the surface breakdown of 185 km between the Garden Village (Koyulhisar, Sivas), produced under quite difficult conditions, is briefly included.

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