Relationships between geotectonic and seismodynamic characteristics of the crust in the Eastern Anatolia

Abstract

The geotechnical lateral variations of the upper crust of the Eastern Anatolian were investigated using amplitude decay, Quality factor, seismic velocity and Poisson's ratio. The average Poisson's ratio was calculated as 0.2988 for the whole study area. Q P and Q S average quality factor were determined as 35 and 57, respectively and average d P and d S values were determined as 0.0149 and 0.0163 for the whole study area. The lowest Q S /Q P value 1.479 and the highest V P /V S value 1.194 are found at the Palu station. The highest V P /V S value, Poisson's ratio and quality factor rates were found in and around Kemaliye. The estimated Poisson's ratio values for the six stations ranged from 0.117 to 0.680 highlighting the regional differences in the seismodynamic of the crust. The entire study area is divided into different geotechnical regimes according to the lateral distributions of the seismodynamics properties. Study results showed once again that the fracture density and dimensions is associated with seismodynamics properties which are the changeable pressure ratios of the upper crust.

Analysis of the Stress Distribution of North Anatolian Fault Zone for the Part Between Amasya-Tokat Cities

“…Dalga genliğindeki azalım oranı soğurma hakkında iyi bir fikir vermektedir (Aki, 1969). Soğurulma ile ilgili ülkemizde ve dünyada birçok araştırma yapılmıştır (Aki ve Chouet, 1975;Aydın ve Kadirov, 2008;Ugalde vd., 2010;Aydın, 2014;2016). Türkiye'de daha önceki çalışmalarında GNSS verileri ile Pamukçu vd.…”