Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 05 Feb 2026 23:30 UT)

Date T index 05 Feb 121 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values. Niue Island Region: Enhanced by 20% during local day. Enhanced by 15% during local night. Northern Australian Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Enhanced by 30% after local dawn. Southern Australian Region: Enhanced by 20% during local day. Near predicted monthly values during local night. Enhanced by 30% after local dawn. 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 05 Feb 2026 23:30 UT)

Date T index MUFs 06 Feb 130 Near to 15% above predicted monthly values 07 Feb 125 Near to 15% above predicted monthly values 08 Feb 120 Near to 15% above predicted monthly values COMMENT: ASWFC SWF HF Communications Warning 19 was issued on 5 February and is current for 6-8 Feb. Maximum Usable Frequencies (MUFs) in the Australian region were mostly enhanced by 20-30% above predicted monthly values during local day hours, with the strongest enhancements observed in the northern Australian region. MUFs were near predicted monthly values during local night hours. Sporadic E was observed across the Australian region during local night hours. MUFs are expected to be near predicted monthly values to enhanced by 15% over 06-08 Feb. Sporadic E is expected in the Australian region during local night hours. Shortwave fadeouts are expected.