Spatiotemporal Comparison of Declustered Catalogs of Earthquakes in Turkey

  • Murat NasEmail author
  • Abdollah Jalilian
  • Yusuf Bayrak


In earthquake seismology, an independent earthquake can produce a set of clusters having fore- and/or aftershocks. The main purpose of seismicity declustering is to refine a given earthquake catalog in order to retain independent events. The goal of retention of independent events by only declustering is a crucial benchmark for most of the mainshock-based analysis in seismology. In the present article, we used a re-updated unified earthquake catalog of Turkey and obtained several declustered catalogs applying different declustering methods. To compare the performance of applied declustering methods, each declustered catalog was then examined by simulation envelopes and Monte Carlo tests using some summary statistics for temporal and spatial point patterns. We found that the declustering method of Zhuang et al. (2002) based on the Epidemic Type Aftershock Sequence (ETAS) model, original version, and particularly Grünthal’s variant of the Gardner and Knopoff (1974) method seemed to be most successful in finding and removing clusters in space and time for the earthquake catalog of Turkey examined.


Seismicity declustering earthquakes Monte Carlo simulation poisson process Ripley’s K-function Besag’s L-function Allan factor 



The authors thank the anonymous reviewers for their helpful and constructive comments that greatly contributed to improving the final version of the paper. They also thank the handling Editor (Prof. Andrzej Kijko) for his generous comments and support during the all review process.


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Authors and Affiliations

  1. 1.Department of Civil EngineeringKaradeniz Technical UniversityTrabzonTurkey
  2. 2.Department of StatisticsRazi UniversityKermanshahIran
  3. 3.Department of GeophysicsKaradeniz Technical UniversityTrabzonTurkey

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