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 21 Mar 2026 23:45 UT)
Approximate Start of disturbance : 07:22UT 19 Mar 2026 Approximate Peak of disturbance : 07:35UT 19 Mar 2026 Approximate End of disturbance : 07:59UT 19 Mar 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.951920 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 11:51UT 17 Mar 2026 Approximate Peak of disturbance : 12:09UT 17 Mar 2026 Approximate End of disturbance : 15:26UT 17 Mar 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.857143 Observed at Sites : Darwin View Details at the WDC Approximate Start of disturbance : 12:36UT 28 Feb 2026 Approximate Peak of disturbance : 12:50UT 28 Feb 2026 Approximate End of disturbance : 13:28UT 28 Feb 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.797950 Observed at Sites : Darwin View Details at the WDC Approximate Start of disturbance : 12:01UT 25 Feb 2026 Approximate Peak of disturbance : 12:56UT 25 Feb 2026 Approximate End of disturbance : 13:38UT 25 Feb 2026 Maximum S4 Index : 0.969720 Eightieth percentile of S4 during disturbance : 0.699910 Observed at Sites : Darwin Weipa View Details at the WDC Approximate Start of disturbance : 14:10UT 23 Jan 2026 Approximate Peak of disturbance : 14:14UT 23 Jan 2026 Approximate End of disturbance : 14:28UT 23 Jan 2026 Maximum S4 Index : 0.701390 Eightieth percentile of S4 during disturbance : 0.679580 Observed at Sites : Niue View Details at the WDC
