Ionospheric Event 2015-02-23

Contact: iono@gnss.be

SUMMARY OF THE EVENT: The ionosphere was disturbed during the daylight of the 23/02/2015 with TEC increase of +60% wrt to the median of the 15 previous days. Small disturbances (+50% TEC) also occurred in the north during the night. As a consequence, the next day 24/02/2015, the TEC was lessened. These disturbances can be linked with the geomagnetic activity which reached active levels (K at Dourbes = 4, with Kp reaching 5) due to the fast solar wind from a coronal hole (source: SIDC).

VTEC Time Series

Figure 1: VTEC Time Series

VTEC point locations

Figure 2: VTEC extracting locations


Figure 1 shows the time evolution of the Vertical Total Electron Content (VTEC) (in red) extracted from the near-real time VTEC maps at 3 different latitudes (Figure 2): a) Northern part (top), b) Brussels (middle) and c) Southern part (bottom). Also shown, the model based on the median from the 15 previous days (in grey).

About this event, see also:

  • VTEC maps during this event: here
  • Comparisons with the median of the last 15 days: here
  • about the origin of the ionospheric disturbances: www.sidc.be