Earthquake Behaviour of the Western Segment of the Eskişehir Fault in Light of Paleoseismological Data

Elma I., Safarov M. A., KARABACAK V., Ozkaymak C., SÜMER Ö.

TURKIYE JEOLOJI BULTENI-GEOLOGICAL BULLETIN OF TURKEY, cilt.68, sa.3, ss.333-356, 2025 (ESCI, TRDizin) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 68 Sayı: 3
  • Basım Tarihi: 2025
  • Doi Numarası: 10.25288/tjb.1647559
  • Dergi Adı: TURKIYE JEOLOJI BULTENI-GEOLOGICAL BULLETIN OF TURKEY
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Central & Eastern European Academic Source (CEEAS), TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.333-356
  • Anahtar Kelimeler: Eski & scedil;ehir fault, paleoseismology, seismic hazard
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

This paper presents the implications regarding earthquake behaviour through detailed fault mapping of the western segment of the Eski & scedil;ehir Fault in light of paleoseismological observations and analytical age data. The stream beds are offset right-laterally by a few meters to a few hundred meters along the western extension of the fault, indicating that the current movement of the Eski & scedil;ehir Fault is of right-lateral strike-slip character. Findings obtained from paleoseismological trenches in Erikli (Bilecik) and Kandilli (Eski & scedil;ehir) villages reveal that recurrent surface ruptures occurred during the Holocene Period on the western segment of the Eski & scedil;ehir Fault. Considering the possibility that the 1956 (M=6.5) Eski & scedil;ehir earthquake may have originated from the central segments of the fault and transferred stress to adjacent segments, it is assessed that there is a high probability of a future earthquake (M approximate to 6.59) on the western segment, which could potentially produce surface faulting following a seismic quiescence period of approximately 1500 years in this segment.