Earthquake hazard potential in the Eastern Anatolian Region of Turkey： seismotectonic b and Dc-values and precursory quiescence Z-value  

作　　者：S. OZTURK 

机构地区：[1]Gumushane University, Department of Geophysics, TR-29100, Gumushane, Turkey

出　　处：《Frontiers of Earth Science》2018年第1期215-236,共22页地球科学前沿（英文版）

摘　　要：The Eastern Anatolian Region of Turkey is one of the most seismically and tectonically active regions due to the frequent occurrence of earthquakes. Thus, the main goal of this study is to analyze the regional and temporal characteristics of seismicity in the Eastern Anatolia in terms of the seismotectonic b-value, fractal dimension Dcvalue, precursory seismic quiescence Z-value, and their interrelationships. This study also seeks to obtain a reliable empirical relation between b and De-values and to evaluate the temporal changes of these parameters as they relate to the earthquake potential of the region. A more up-to-date relation of De = 2.55 -0.39＊b is found with a very strong negative correlation coefficient （r=- 0.95） by using the orthogonal regression method. The b-values less than 1.0 and the De-values greater than 2.2 are observed in the Northeast Anatolian Fault Zone, Askale, Erzurum, Igdlr and Caldlran Faults, Dogubeyazlt Fault Zone, around the Genc Fault, the western part of the Bitlis-Zagros Thrust Zone, Pulumir and Karakogan Faults, and the SancakUzunpmar Fault Zone. In addition, the regions having small b-values and large Z-values are calculated around the Geng, Piulumur and Karakogan Faults as well as the Saneak-Uzunpmar Fault Zone. Remarkably, the combinations of these seismotectonic parameters could reveal the earthquake hazard potential in the Eastern Anatolian Region of Turkey, thus creating an increased interest in these anomaly regions.The Eastern Anatolian Region of Turkey is one of the most seismically and tectonically active regions due to the frequent occurrence of earthquakes. Thus, the main goal of this study is to analyze the regional and temporal characteristics of seismicity in the Eastern Anatolia in terms of the seismotectonic b-value, fractal dimension Dcvalue, precursory seismic quiescence Z-value, and their interrelationships. This study also seeks to obtain a reliable empirical relation between b and De-values and to evaluate the temporal changes of these parameters as they relate to the earthquake potential of the region. A more up-to-date relation of De = 2.55 -0.39＊b is found with a very strong negative correlation coefficient （r=- 0.95） by using the orthogonal regression method. The b-values less than 1.0 and the De-values greater than 2.2 are observed in the Northeast Anatolian Fault Zone, Askale, Erzurum, Igdlr and Caldlran Faults, Dogubeyazlt Fault Zone, around the Genc Fault, the western part of the Bitlis-Zagros Thrust Zone, Pulumir and Karakogan Faults, and the SancakUzunpmar Fault Zone. In addition, the regions having small b-values and large Z-values are calculated around the Geng, Piulumur and Karakogan Faults as well as the Saneak-Uzunpmar Fault Zone. Remarkably, the combinations of these seismotectonic parameters could reveal the earthquake hazard potential in the Eastern Anatolian Region of Turkey, thus creating an increased interest in these anomaly regions.

关 键 词：Eastern Anatolia B-VALUE fractal dimension precursory seismic quiescence earthquake hazard 

分 类 号：O4-4[理学—物理] P315.5[天文地球—地震学]