| Abstract | In this study, Turkey earthquake catalog of the events within the time period of 1900-2015 prepared by Bo˘gaziçi
University Kandilli Observatory and Earthquake Research Institute is analyzed. The catalog consists of earthquakes
occurred in Turkey and surrounding area (32o-45oN/23o-48oE). The current earthquake catalog data has
been checked in two aspects; the time dependent variation and compliance for different regions. Specifically the
data set prior to 1976 was found deficient. In total, 7 regions were evaluated according to the tectonic specifications
and data set.
In this study for every region original data were used without any change; b- values, a- values, Magnitude of
completeness (Mc) were calculated. For the calculation of b- values focal depth was selected as h= 0-50 km.
One of the important complications for the seismic catalogs is discriminating real (natural) seismic events from
artificial (unnatural) seismic events. Therefore within the original current catalog events especially artificial
quarry blasts and mine blasts have been separated by declustering and dequarry methods. Declustering process
eliminates induced earthquakes especially occurred in thermal regions, large water basins, mine regions from the
original catalogs. Current moment tensor catalog prepared by Kalafat, 2015 the faulting type map of the region
was prepared. As a result, for each region it is examined if there is a relation between fault type and b- values.
In this study, the hypothesis of the relation between previously evaluated and currently ongoing extensional,
compression, strike-slip fault regimes in Turkey and b- values are tested one more time.
This study was supported by the Department of Science Fellowship and Grant programs (2014-2219) of
TUBITAK (The Scientific and Technological Research Councilof Turkey). It also encourages the conduct of the
study and support the constructive contributionthat Prof.Dr. Nafi TOKSÖZ to offer my eternal gratitude. |
