Akademik Veri Yönetim Sistemi
15.ULUSLARARASI BİLİMSEL ÇALIŞMALAR KONGRESİ, Ankara, Türkiye, 26 - 27 Aralık 2024, ss.1-15
Türkiye, situated in a seismically active region, frequently endures significant earthquakes. On February 6, 2023, two devastating earthquakes struck along segments of the East Anatolian Fault Zone (EAFZ), separated by approximately 9 hours. The initial quake, with a moment magnitude scale (Mw) of 7.7, hit Pazarcık, Kahramanmaraş, at UTC 01:17. Subsequently, at UTC 10:24, another earthquake of Mw 7.6 occurred in Elbistan, Kahramanmaraş. This study focuses on analyzing co-seismic surface displacements using Precise Point Positioning (PPP) and Interferometric Synthetic Aperture Radar (InSAR) techniques. GNSS measurements from 20 stations of the Turkish National Permanent GNSS Network-Active (TNPGN-Active) near the quake zone, along with pre- and post-earthquake Sentinel-1A SAR satellite data, were utilized. The maximum observed GNSS displacements in the north, east, and vertical components were approximately -465 cm, +49 cm, and -13 cm, respectively. Additionally, InSAR data indicated line-of-sight (LOS) displacements ranging from -85 cm to +99 cm, consistent with PPP findings. The study findings underscore the efficacy of GNSS and InSAR in determining ground displacements induced by natural disasters like earthquakes. Furthermore, the analysis before and after the earthquake shows that the directions of displacement are consistent with the left-lateral strike-slip character observed in the focal mechanism solutions.