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Evaluation of Coulomb Stress Accumulations and Magnitudefrequency (b-value) Distribution for the East Anatolian Region of Turkey
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 11th Congress of the Balkan Geophysical Society, Oct 2021, Volume 2021, p.1 - 5
Abstract
The East Anatolian Region (EAR) is struck with strong or devastating earthquakes in recent years. Therefore, an assessment of the next earthquake hazard in this part of Turkey would be useful. This type of evaluation must be focused on the identification of the seismotectonic parameters. In this paper, Coulomb stress changes in and around the East Anatolian Region of Turkey have been examined and correlated with the regional distribution of the magnitude-frequency distribution (b-value). 42 earthquakes in which occurred between 2007 and 2021 are used to calculate the Coulomb stress change, and 57,888 earthquakes that occurred between 1970 and 2021 are used to calculate the b-value distribution. Several anomaly regions of small b-value and high-stress value are found in and around the Malatya fault, Sancak Uzunpınar Fault Zone, Muş Thrust Zone, Genç fault, Göynük Fault Zone, Erciş fault, Başkale fault, and Hasan Timur fault at the beginning of 2021. An apparent correlation between the stress changes and the b-value of the earthquakes is found and this confirms the utility of the stress and bvalue maps by supporting the expected locations of the forthcoming strong/large earthquakes and mitigating earthquake hazards. Thus, special attention must be given to these anomaly areas.