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 02 Jul 2025 00:25 UT)

Approximate Start of disturbance : 12:42UT 22 Jun 2025 Approximate Peak of disturbance : 12:50UT 22 Jun 2025 Approximate End of disturbance : 12:57UT 22 Jun 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.894000 Observed at Sites : Darwin View Details at the WDC Approximate Start of disturbance : 08:32UT 13 Jun 2025 Approximate Peak of disturbance : 11:06UT 13 Jun 2025 Approximate End of disturbance : 14:05UT 13 Jun 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.695560 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 10:51UT 02 Jun 2025 Approximate Peak of disturbance : 14:03UT 02 Jun 2025 Approximate End of disturbance : 15:37UT 02 Jun 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.681922 Observed at Sites : Darwin Weipa View Details at the WDC Approximate Start of disturbance : 06:46UT 01 Jun 2025 Approximate Peak of disturbance : 10:17UT 01 Jun 2025 Approximate End of disturbance : 10:17UT 01 Jun 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.702133 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 08:55UT 28 Apr 2025 Approximate Peak of disturbance : 12:16UT 28 Apr 2025 Approximate End of disturbance : 13:20UT 28 Apr 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.832250 Observed at Sites : Darwin Niue Weipa View Details at the WDC