Ionospheric Event 2016-09-25

Contact: iono@gnss.be

SUMMARY OF THE EVENT: The ionospheric VTEC started to increase at around 11:30(UTC), the differences with respect to the median of the 15 previous days reaches its maximum peak at 14:00(UTC) with up to 77% of increase. It went back to a quiet state after 17:00(UTC). The beginning of the VTEC increased corresponds to the beginning of the sign inversion of the Interplanetary Magnetic Field Bz component.

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