Recent Scintillation Events
The following is a list of recent periods of high and sustained ionospheric scintillation as detected in the ASWFC scintillation monitor network. Note that these are auto-detected and not manually quality controlled.
ASWFC provides a free email alert service which notifies subscribers of scintillation events as they occur. To subscribe to this service, please visit the Ionospheric Scintillation alert page.
To see the raw data for these events in more detail, please look up the relevant locations and times at the World Data Centre ionospheric scintillation page.
Please contact ASWFC if you have any questions about these events or have any feedback regarding ionospheric scintillation services.
(last updated 28 Aug 2025 16:30 UT)
Approximate Start of disturbance : 08:41UT 27 Aug 2025 Approximate Peak of disturbance : 08:58UT 27 Aug 2025 Approximate End of disturbance : 08:59UT 27 Aug 2025 Maximum S4 Index : 0.894720 Eightieth percentile of S4 during disturbance : 0.845280 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 13:33UT 26 Aug 2025 Approximate Peak of disturbance : 13:47UT 26 Aug 2025 Approximate End of disturbance : 13:50UT 26 Aug 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.919130 Observed at Sites : Darwin View Details at the WDC Approximate Start of disturbance : 07:39UT 07 Aug 2025 Approximate Peak of disturbance : 07:43UT 07 Aug 2025 Approximate End of disturbance : 07:55UT 07 Aug 2025 Maximum S4 Index : 0.816410 Eightieth percentile of S4 during disturbance : 0.584570 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 07:41UT 31 Jul 2025 Approximate Peak of disturbance : 07:55UT 31 Jul 2025 Approximate End of disturbance : 07:59UT 31 Jul 2025 Maximum S4 Index : 0.971270 Eightieth percentile of S4 during disturbance : 0.839700 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 14:44UT 25 Jul 2025 Approximate Peak of disturbance : 14:50UT 25 Jul 2025 Approximate End of disturbance : 14:59UT 25 Jul 2025 Maximum S4 Index : 0.756180 Eightieth percentile of S4 during disturbance : 0.650200 Observed at Sites : Weipa View Details at the WDC
