Seismogenic zones in eastern Turkey

Niyazi Turkelli*, Eric Sandvol, Ekrem Zor, Rengin Gok, Tolga Bekler, Ali Al-Lazki, Hayrullah Karabulut, Sadi Kuleli, Tuna Eken, Cemil Gurbuz, Salih Bayraktutan, Dogan Seber, Muawia Barazangi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

83 Citations (Scopus)


A 29-station temporary broadband PASSCAL network was operated from late October 1999 to August 2001 in eastern Turkey in order to decipher the geodynamics of one of the youngest continent-continent collision zones in the world. This paper focuses on the hypocentral distribution of local earthquakes located during the operation of the network and provides new insights into the active faulting in the Anatolian plateau. A total of 1165 earthquakes were located and classified into four different categories based on the reliability of the locations as established by the data coverage. The accuracy of the locations ranked in the best two categories is estimated to be less than approximately 5 km. The results show that seismic activity in Eastern Turkey is higher than previously documented and there were no subcrustal earthquakes beneath the Arabian-Eurasian collision zone or beneath the Anatolian plateau during our deployment. This result suggests no or very little underthrusting of the Arabian plate beneath Eurasia. Our results also suggest that the North Anatolian Fault zone extends farther toward the southeast, well beyond the Karliova triple junction, and that a number of unmapped active, seismogenic faults exist in the region. We also observed a possible difference in the seismogenic thickness of the East Anatolian fault zone (EAFZ) and the North Anatolian fault zone (NAFZ).

Original languageEnglish
Pages (from-to)TUR 2-1 - TUR 2-4
JournalGeophysical Research Letters
Issue number24
Publication statusPublished - 15 Dec 2003
Externally publishedYes


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