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 25 Jul 2025 23:15 UT)
Approximate Start of disturbance : 14:44UT 25 Jul 2025 Approximate Peak of disturbance : 14:50UT 25 Jul 2025 Approximate End of disturbance : 14:59UT 25 Jul 2025 Maximum S4 Index : 0.756180 Eightieth percentile of S4 during disturbance : 0.650200 Observed at Sites : Weipa View Details at the WDC Approximate Start of disturbance : 08:34UT 18 Jul 2025 Approximate Peak of disturbance : 08:37UT 18 Jul 2025 Approximate End of disturbance : 08:50UT 18 Jul 2025 Maximum S4 Index : 0.935270 Eightieth percentile of S4 during disturbance : 0.891950 Observed at Sites : Niue View Details at the WDC Approximate Start of disturbance : 09:40UT 04 Jul 2025 Approximate Peak of disturbance : 10:03UT 04 Jul 2025 Approximate End of disturbance : 10:07UT 04 Jul 2025 Maximum S4 Index : 0.538890 Eightieth percentile of S4 during disturbance : 0.505100 Observed at Sites : Niue View Details at the WDC 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
