Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 21 Oct 2026 23:36 UT)

Date T index 21 Oct 46 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 15% during local day. Depressed by 15% during local night. Northern Australian Region: Mostly near predicted monthly values. Depressed by 20% after local dawn. 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 61 Oct 60 Nov 58

Ionospheric Forecast

(last updated 21 Oct 2026 23:36 UT)

Date T index MUFs 22 Oct 50 Near predicted monthly values 23 Oct 50 Near predicted monthly values 24 Oct 50 Near predicted monthly values COMMENT: Maximum Usable Frequencies (MUFs) on UT day 21-Oct in the Australian region were mostly near predicted values, with some depressions in the northern Australian region after local dawn. Mild depressions were also observed at Canberra and Hobart. MUFs are forecast to be near predicted monthly values over 22-24 Oct.