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 17 Apr 2026 13:05 UT)

Approximate Start of disturbance : 08:33UT 16 Apr 2026 Approximate Peak of disturbance : 08:47UT 16 Apr 2026 Approximate End of disturbance : 08:48UT 16 Apr 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 1.00000 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 12:49UT 13 Apr 2026 Approximate Peak of disturbance : 12:55UT 13 Apr 2026 Approximate End of disturbance : 13:10UT 13 Apr 2026 Maximum S4 Index : 0.946600 Eightieth percentile of S4 during disturbance : 0.847030 Observed at Sites : Darwin View Details at the WDC Approximate Start of disturbance : 13:24UT 08 Apr 2026 Approximate Peak of disturbance : 13:38UT 08 Apr 2026 Approximate End of disturbance : 13:40UT 08 Apr 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.899840 Observed at Sites : Darwin View Details at the WDC Approximate Start of disturbance : 09:41UT 31 Mar 2026 Approximate Peak of disturbance : 09:51UT 31 Mar 2026 Approximate End of disturbance : 09:56UT 31 Mar 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.999000 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 11:30UT 27 Mar 2026 Approximate Peak of disturbance : 11:45UT 27 Mar 2026 Approximate End of disturbance : 11:55UT 27 Mar 2026 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.970535 Observed at Sites : Darwin View Details at the WDC