Ionospheric Event 2020-04-20

Contact: iono@gnss.be

SUMMARY OF THE EVENT: Ionospheric activity was observed above Europe during the 20th of April 2020 from 12:00 until 18:00 UTC. The Total Electron Content (TEC) was increased in average by 8 TECu at the peak 13:30 UTC. A maximum absolute TEC increase of 16 TECu (+92% with respect to the quiet condition) was estimated in the South, while maximum relative TEC increase of +154% (8.5 TECu) occurred “at mid latitude (55°)”. The next day, smaller increase of TEC up to 11 TECu were observed mostly in the Southern part.

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