Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 23 Oct 2025 23:30 UT)

Date T index 23 Oct 116 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Enhanced by 20% during local day. Enhanced by 20% during local night. Southern Australian Region: Mostly near predicted monthly values. Enhanced by 20% after local dawn. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Sep 109 Oct 89 Nov 89

Ionospheric Forecast

(last updated 23 Oct 2025 23:30 UT)

Date T index MUFs 24 Oct 120 Near to 15% above predicted monthly values 25 Oct 120 Near to 15% above predicted monthly values 26 Oct 120 Near to 15% above predicted monthly values COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 23-Oct were near predicted monthly values to 20% enhanced. Spread F was observed at Hobart during local night hours. MUFs are expected to be near predicted monthly values to 15% enhanced over 24-26 Oct.