Ionospheric Event 2014-02-27


SUMMARY OF THE EVENT: Large ionospheric disturbances were observed from the evening of 27/02/14 until the morning of 28/02/14 for the Northern and Southern part of Europe, while the ionospheric state remained quiet above Brussels. These disturbances are due to the large Solar flare (X4.9) of 25/02/14 which generated a CME shock of Kp=6 arriving at the Earth on 27/02/14 at 15:00 UTC (source:

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: