Akademik Veri Yönetim Sistemi
ARABIAN JOURNAL OF GEOSCIENCES, cilt.14, sa.22, 2021 (SCI-Expanded)
The Sivrice earthquake is the greatest earthquake that appeared in the last 120 years in the Hazar-Sincik segment of the left-lateral strike-slip East Anatolian Fault Zone in Eastern Turkey. This earthquake caused loss of lives and properties, and heavy damage was observed. The statistical properties of aftershocks are analyzed by using b-value known as Gutenberg-Richter law, p-value from Omori law, and Coulomb stress analysis. The magnitude of completeness (M-c) value is determined as 1.5, and the b-value is calculated as 0.77, and it is determined that the mainshock occurred in a region with a high stress level. The p-value is calculated as 0.9, indicating that aftershocks will continue for a certain period of time. Besides, spatial variation of M-c, p-, and b-parameters has been examined. It is seen that the Mc value varies from 1.2 to 2.4, the b-value changes between 0.5 and 1.2, and the p-value ranges from 0.6 to 1.3. The lower b-, p-, and positive Coulomb values indicate that there is still high stress accumulation in the area northeast and southwest of the fault and aftershocks will cluster in these areas. The b- and p-values are higher to the southwest of the mainshock, and since the stress in this region is lower than in other regions, we predict that aftershocks will attenuate faster in this area. Positive Coulomb stress values indicate potential future earthquake areas. The vast majority of aftershocks from the Sivrice earthquake occurred in positive Coulomb stress areas. The stress in the study area is at a critical level, and this earthquake could also activate other segments of the Eastern Anatolian Fault Zone, especially in the southwest direction.