Ionospheric Event 2015-03-17

Contact: iono@gnss.be

SUMMARY OF THE EVENT: Major disturbances were observed in the ionosphere the 17th of March 2015 due to a geomagnetic storm (k index up to 7 at Dourbes). During the day, in the southern part of Europe, TEC increased by 118% (+48 TECu) while in the northern part it decreased suddenly by 75% (-17 TECu) with respect to the median of the 15 previous days. During the night, the ionosphere was active in the northern part. The next day, TEC remained at a low level.

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