Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 26 Feb 2026 23:30 UT)

Date T index 26 Feb 108 Observed Australian Regional MUFs Cocos Island Region: Mostly near predicted monthly values. Enhanced by 20% after local dawn. Niue Island Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Southern Australian Region: Mostly near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Jan 96 Feb 88 Mar 87

Ionospheric Forecast

(last updated 26 Feb 2026 23:30 UT)

Date T index MUFs 27 Feb 100 Near predicted monthly values 28 Feb 110 Near predicted monthly values 01 Mar 95 Near predicted monthly values COMMENT: ASWFC SWF HF Communications Warning 26 was issued on 25 February and is current for 26-27 Feb. Maximum usable frequencies (MUFs) in the Australian region on UT day 26-Feb were near predicted values to enhanced by 35%. Sporadic-E was observed in Hobart during local night hours. MUFs are expected to be near predicted values over 27-28 Feb and 1-Mar.