Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 14 Sep 2026 23:30 UT)

Date T index 14 Sep 66 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Enhanced by 15% over the UT day. Monthly T index: Month T index Aug 66 Sep 62 Oct 60

Ionospheric Forecast

(last updated 14 Sep 2026 23:30 UT)

Date T index MUFs 15 Sep 60 Near predicted monthly values/depressed 5 to 10% 16 Sep 45 Near predicted monthly values/depressed 5 to 15% 17 Sep 55 Near predicted monthly values/depressed 5 to 15% COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 14-Sep were near predicted monthly values. MUFs are expected to be near predicted monthly values to depressed by up to 10% on 15-Sep and near predicted monthly values to depressed by up to 15% over 16-17 Sep. These depressions are due to anticipated geomagnetic activity and are more likely in the southern Australian region.