Ionospheric Event 2017-08-31

Contact: iono@gnss.be

SUMMARY OF THE EVENT: A major increase of the ionospheric VTEC occured during the day of the 31st of August associated with the arrival of the high speed solar streams. The geomagnetic index Kp reached 5 at Dourbes. Above Brussels, there was up to +12 TECu (150%) of differences with respect to the median of the last 15 days.

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