Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 23 Aug 2025 23:30 UT)

Date T index 23 Aug 95 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 20% during local day. Enhanced by 45% during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Jul 88 Aug 96 Sep 93

Ionospheric Forecast

(last updated 23 Aug 2025 23:30 UT)

Date T index MUFs 24 Aug 100 Near predicted monthly values 25 Aug 100 Near predicted monthly values 26 Aug 80 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 24-Aug were near predicted monthly values. Spread F was observed at Hobart and Brisbane during local night hours. MUFs are expected to be near predicted monthly values over 24-26 Aug, with a chance of mild depressions on 26-Aug due to possible geomagnetic activity.