Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 07 Oct 2025 23:30 UT)

Date T index 07 Oct 112 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 30% during local day. Enhanced by 20% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Depressed by 15% over the UT day. Monthly T index: Month T index Sep 109 Oct 89 Nov 89

Ionospheric Forecast

(last updated 07 Oct 2025 23:30 UT)

Date T index MUFs 08 Oct 110 Near predicted monthly values to 15% enhanced 09 Oct 115 Near predicted monthly values to 15% enhanced 10 Oct 110 Near predicted monthly values to 15% enhanced COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 7-Oct were mostly near predicted values to 15% enhanced. Spread-F was observed in Hobart during local night hours. MUFs are expected to be mostly near predicted values over 8-10 Oct to 15% enhanced.