Fig. 5From: Monitoring of the ionosphere TEC variations during the 17th August 1999 Izmit earthquake using GPS data(a) Temporal variation of the slant TEC (STEC) observed at the TUBI station, during the period 13#x2013;22 August, 1999 (days 225#x2013;234), (b) STEC for all the satellites the day of the earthquake from the TUBI station. The star indicates the time of the earthquake.Back to article page