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 18 Sep 2025 22:45 UT)
Approximate Start of disturbance : 07:56UT 07 Sep 2025 Approximate Peak of disturbance : 08:14UT 07 Sep 2025 Approximate End of disturbance : 08:20UT 07 Sep 2025 Maximum S4 Index : 0.796200 Eightieth percentile of S4 during disturbance : 0.693800 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 07:11UT 04 Sep 2025 Approximate Peak of disturbance : 07:15UT 04 Sep 2025 Approximate End of disturbance : 07:30UT 04 Sep 2025 Maximum S4 Index : 0.850240 Eightieth percentile of S4 during disturbance : 0.587630 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 08:22UT 01 Sep 2025 Approximate Peak of disturbance : 08:24UT 01 Sep 2025 Approximate End of disturbance : 08:40UT 01 Sep 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.993870 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 08:25UT 31 Aug 2025 Approximate Peak of disturbance : 08:26UT 31 Aug 2025 Approximate End of disturbance : 08:54UT 31 Aug 2025 Maximum S4 Index : 0.775800 Eightieth percentile of S4 during disturbance : 0.543910 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 08:53UT 30 Aug 2025 Approximate Peak of disturbance : 09:04UT 30 Aug 2025 Approximate End of disturbance : 09:16UT 30 Aug 2025 Maximum S4 Index : 0.895940 Eightieth percentile of S4 during disturbance : 0.757690 Observed at Sites : Niue View Details at the WDC
