Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 12 Aug 2026 23:30 UT)

Date T index 12 Aug 53 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Near predicted monthly values during local day. Depressed by 20% during local night. Northern Australian Region: Near predicted monthly values during local day. Depressed by 20% 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 Jul 75 Aug 64 Sep 61

Ionospheric Forecast

(last updated 12 Aug 2026 23:30 UT)

Date T index MUFs 13 Aug 60 Near predicted monthly values 14 Aug 55 Near predicted monthly values 15 Aug 45 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 12-Aug were mostly near predicted values to 20% depressed. Degraded conditions were observed in Darwin during local night and dawn hours. MUFs are expected to be mostly near predicted values. Mild depressions are possible during local night hours on 15-Aug.