Seismicity and strain accumulation around Karliova Triple Junction (Turkey)

Aktug B., DİKMEN Ü., DOĞRU A., ÖZENER H.

JOURNAL OF GEODYNAMICS, cilt.67, ss.21-29, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 67
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.jog.2012.04.008
  • Dergi Adı: JOURNAL OF GEODYNAMICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.21-29
  • Anahtar Kelimeler: East Anatolian Fault System, Seismicity, GPS, Block modeling, b-Value, FREQUENCY-MAGNITUDE RELATION, B-VALUE, PLATE, STRESS, DEFORMATION, AREA
  • Ankara Üniversitesi Adresli: Evet

Özet

GPS studies in Turkey date back to the early 1990s, but were mostly focused on the seismically active North Anatolian Fault System (NAFS), or on the more populated Western Anatolia. Relatively few studies were made of the seismically less-active East Anatolian Fault System (EAFS), although it has the potential to produce large earthquakes. In this study, we present the results of a combination of geodetic and seismological data around the Karliova Triple junction (KTJ), which lies at the intersection of the North- and East Anatolian Fault Systems. In particular, the geodetic slip rates obtained through block modeling of GPS velocities were compared with b-values to assess seismicity in the region. Yedisu segment, one of the best-known seismic gaps in Turkey, was specifically analyzed. The relatively low b-values across Yedisu segment verify the accumulation of seismic energy in this segment, and the GPS-derived geodetic slip rates suggest that it has the potential to produce an earthquake of Mw 7.5 across an 80-km rupture zone.