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Preprints
https://doi.org/10.5194/nhess-2020-368
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2020-368
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  21 Nov 2020

21 Nov 2020

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This preprint is currently under review for the journal NHESS.

A Homogeneous Earthquake Catalogue for Turkey and Surrounding Region

Onur Tan Onur Tan
  • İstanbul University – Cerrahpaşa, Faculty of Engineering, Dept. of Geophysics, Istanbul, Turkey

Abstract. A new earthquake catalogue for Turkey and surrounding region (32°–47° N, 20°–52° E) is compiled for the period 1900–2017. The earthquake parameters are obtained from the Bulletin of International Seismological Centre that is fully updated in 2020. New conversion equations between moment magnitude and the other scales (md, ML, mb, Ms and M) are determined using in the General Orthogonal Regression method to build up a homogeneous catalogue, which is the essential data for seismic hazard studies. The 95 % confidence intervals are estimated using the bootstrap method with 1000 samples. The equivalent moment magnitudes (Mw*) for the entire catalogue are calculated using the magnitude relations to homogenise the catalogue. The magnitude of completeness is 2.9 Mw* and 3.0–3.2 Mw* for Turkey and Greece generally. The final dataset is not declustered or truncated using a threshold magnitude because of motivation for generating a widely usable catalogue. It contains not only Mw*, but also the average and median of the observed magnitudes for each event. Contrary to the limited earthquake parameters in the previous catalogues, the 45 parameters of approximately 700 k events occurred in a wide area from the Balkans to the Caucasus are presented.

Onur Tan

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Short summary
Turkey and the surrounding area is one of the most seismically active regions. In this study, an extended and homogenised earthquake catalogue, which is essential for seismic hazard studies, is presented in an easily manageable format for a broad range of researchers. It is the most comprehensive catalogue for the region from the Balkans to the Caucasus and contains approximately 700,000 events between 1900 and 2017.
Turkey and the surrounding area is one of the most seismically active regions. In this study, an...
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