Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 07 Apr 2026 23:30 UT)

Date T index 07 Apr 97 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 60% during local night. Niue Island Region: Enhanced by 30% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 15% 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 Mar 92 Apr 83 May 81

Ionospheric Forecast

(last updated 07 Apr 2026 23:30 UT)

Date T index MUFs 08 Apr 90 Near predicted monthly values 09 Apr 90 Near predicted monthly values 10 Apr 90 Near predicted monthly values COMMENT: Maximum Usable Frequencies (MUFs) in the Australian region on UT day 07-Apr were mostly near predicted values to 15% enhanced. Darwin MUFs were 40-50% enhanced during local night hours. MUFs are expected to be near predicted monthly values over 08-10 Apr. Southern Australian region HF conditions may become mildly degraded during local night hours over 10-11 Apr.