Ionospheric Event 2018-04-20

Contact: iono@gnss.be

SUMMARY OF THE EVENT: Following the coronal hole of April 16th, the solar wind speed increased resulting of active geomagnetic activity the 20th of April. The TEC was increased by 110% (15 TECU) in the South of Europe around 11:30 UTC the 20th of April.

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