Akademik Veri Yönetim Sistemi
Mühendislik Bilimleri ve Tasarım Dergisi, cilt.10, sa.1, ss.238-246, 2022 (Hakemli Dergi)
The estimation of the variation of the b-value, which is frequency distribution of a
magnitude given in an earthquake data set of any region, is important parameter for
interpretation of tectonic mechanism and seismic hazard assessment of that region.
There is an inverse correlation between stress and b-value. The magnitudefrequency relationship is described by the well-known the Gutenberg-Richter
relationship. The purpose of this paper is to investigate the recent seismicity of the
region between the Bodrum and Fethiye, the south-western Anatolia in Turkey. A
total of 27357 earthquake data is taken into account in this study in the period
between 2004 to 2020 with magnitude (Ml) larger than 2. The majority of focal
depths of earthquakes are concentrated between 0 and 33 km. The b-value in the
Gutenberg-Richter relationship was estimated by the maximum likelihood method
in this study. The estimated b-values range between 0.5 and 2 in the study region.
While the lower b-values (0.5-1) are located at the SE of the study area (mainly the
Beydağları unit), higher values (1-2) are trending on the west-east direction along
the fault zones. The highest b-values in the study area are possibly related with the
brittle lower-mid crust, thermal regime, normal faults and young basins bounded by
these faults.