Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 26 Sep 2026 23:30 UT)

Date T index 26 Sep 53 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Depressed by 15% during local night. Antarctic Region (Casey/Davis/Mawson): Depressed by 15% over the UT day. Monthly T index: Month T index Aug 66 Sep 62 Oct 60

Ionospheric Forecast

(last updated 26 Sep 2026 23:30 UT)

Date T index MUFs 27 Sep 58 Near predicted monthly values 28 Sep 65 Near predicted monthly values 29 Sep 65 Near predicted monthly values COMMENT: Maximum Usable Frequencies (MUFs) in the Australian region were mostly near predicted monthly values over UT day 26-Sep with depressions of up to 15% during local night in the Southern Australian region. Canberra experienced spread-F during local night. MUFs are forecast to be near predicted monthly values over 27-29 Sep.