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 30 May 2025 04:00 UT)

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 Approximate Start of disturbance : 11:21UT 26 Apr 2025 Approximate Peak of disturbance : 13:32UT 26 Apr 2025 Approximate End of disturbance : 15:10UT 26 Apr 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.795448 Observed at Sites : Darwin Weipa View Details at the WDC Approximate Start of disturbance : 11:05UT 01 Apr 2025 Approximate Peak of disturbance : 11:12UT 01 Apr 2025 Approximate End of disturbance : 11:20UT 01 Apr 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 1.00000 Observed at Sites : Weipa View Details at the WDC Approximate Start of disturbance : 11:27UT 31 Mar 2025 Approximate Peak of disturbance : 12:36UT 31 Mar 2025 Approximate End of disturbance : 15:14UT 31 Mar 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.828963 Observed at Sites : Darwin Weipa View Details at the WDC Approximate Start of disturbance : 11:06UT 30 Mar 2025 Approximate Peak of disturbance : 11:08UT 30 Mar 2025 Approximate End of disturbance : 11:30UT 30 Mar 2025 Maximum S4 Index : 1.00000 Eightieth percentile of S4 during disturbance : 0.955820 Observed at Sites : Weipa View Details at the WDC