Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 07 Nov 2025 23:30 UT)

Date T index 07 Nov 114 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 30% during local day. Near predicted monthly values during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Enhanced by 15% during local day. Enhanced by 15% during local night. Southern Australian Region: Enhanced by 20% during local day. Near predicted monthly values during local night. Depressed by 20% after local dawn. Antarctic Region (Casey/Davis/Mawson): Depressed by 15% over the UT day. Monthly T index: Month T index Oct 104 Nov 89 Dec 90

Ionospheric Forecast

(last updated 07 Nov 2025 23:30 UT)

Date T index MUFs 08 Nov 65 Depressed 15%/near predicted monthly values 09 Nov 90 Near predicted monthly values 10 Nov 100 Near predicted monthly values COMMENT: ASWFC Preliminary HF Communications Warning 102 was issued on 6 November and is current for 6-8 Nov. Maximum usable frequencies (MUFs) in the Australian region on UT day 07-Nov were near predicted monthly values to 20% enhanced. MUFs are 20% depressed after local dawn in southern Australian regions. MUFs are expected to be near predicted monthly values to 15% depressed on 08-Nov, returning to near predicted monthly values over 09-10 Nov. Shortwave fadeouts are probable.