A statistical analysis of seismo-ionospheric TEC anomalies before 63 M(w)5.0 earthquakes in Turkey during 2003-2016


Şentürk E. , Çepni M. S.

ACTA GEOPHYSICA, cilt.66, ss.1495-1507, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 66
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s11600-018-0214-2
  • Dergi Adı: ACTA GEOPHYSICA
  • Sayfa Sayısı: ss.1495-1507

Özet

In this study, pre-seismic and post-seismic total electron content (TEC) anomalies of 63 M(w)5.0 earthquakes in Turkey (36 degrees-42 degrees N, 26 degrees-45 degrees E) were statistically investigated. The largest earthquake that occurred in Turkey during 2003-2016 is the M-w 7.1 Van earthquake on October 23, 2011. The TEC data of epicenters is obtained from CODE-GIM using a simple 4-point bivariate interpolation. The anomalies of TEC variations were determined by using a quartile-based running median process. In order to validate GIM results, we used the GPS-TEC data of available four IGS stations within the size of the Van earthquake preparation area. The anomalies that are detected by GIM and GPS-TEC show a similar pattern. Accordingly, the results obtained with CODE-GIM are reliable. The statistical results show that there are not prominent earthquake precursors for M(w)6.0 earthquakes in Turkey.