Ionospheric Summary and Forecast
Ionospheric Summary
(last updated 30 May 2025 23:35 UT)
Date T index 30 May 86 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Depressed by 25% during local night. Niue Island Region: No data available during local day. No data available during local night. Northern Australian Region: Near predicted monthly values during local day. Depressed by 30% during local night. Southern Australian Region: Depressed by 15% during local day. Depressed by 15% during local night. Depressed by 25% after local dawn. Antarctic Region (Casey/Davis/Mawson): Depressed by 20% over the UT day. Monthly T index: Month T index Apr 123 May 113 Jun 111
Ionospheric Forecast
(last updated 30 May 2025 23:35 UT)
Date T index MUFs 31 May 80 5 to 15% below predicted monthly values 01 Jun 95 Near predicted monthly values 02 Jun 95 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) in the southern Australian region on UT day 30-May were depressed by up to 25%. MUFs in the northern Australian region were near predicted monthly values to depressed by up to 30%. Spread F was observed at Hobart and Canberra during local night hours. Sporadic E was observed at Cocos Islands during much of the UT day. MUFs are expected to be near predicted monthly values over 31-May to 02-Jun, with depressions of up to 15% possible on 31-May. Shortwave fadeouts are possible.
