Investigation of the Effect of Elazig-Sivrice Earthquake on the Locations of TUSAGA-Active Stations with Web Based GPS Software

TNPGN-Active (Turkey National Permanent GNSS Network-Active) system, which placed the Republic of Turkey and KKTC with 158 fixed GNSS (Global Navigation Satellite System) station is available for commercial and academic studies. On January 24, 2020, a severe earthquake with an instrumental magnitude MI = 6.6 (Mw = 6.5) occurred on the Eastern Anatolian Fault Zone in Sivrice-Elazığ center at 20:55 (local Time). The earthquake was felt in Eastern Anatolia, Southeastern Anatolia, Central Anatolia and Black Sea regions. In the study, it was investigated whether there is any change in the locations of TNPGN-Active stations in the impact area of Sivrice-Elazığ earthquake. In this context, the magnitudes and directions of the movements of ELAZ, ERGN, MALY and SIV1 TNPGN-Active stations were determined. 24-hour data 7 days before and 7 days after the earthquake was evaluated in Online Positioning User Service (OPUS) and Australian Online GPS Processing Service (AUSPOS) web-based data processing services, and daily exact coordinate data sets were obtained. The results of both assessment services gave similar or close results. As a result of the evaluation, the deformations detected at ELAZ, ERGN, MALY and SIV1 TNPGN-Active stations were determined significantly.