Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 26 Apr 2025 23:31 UT)

Date T index 26 Apr 123 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. 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 Mar 126 Apr 115 May 113

Ionospheric Forecast

(last updated 26 Apr 2025 23:31 UT)

Date T index MUFs 27 Apr 125 Near predicted monthly values 28 Apr 125 Near predicted monthly values 29 Apr 125 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 26-Apr were near predicted monthly values to 25% enhanced in northern Australian regions. Spread F was observed at Hobart during local night hours. Ionospheric scintillation was observed at Darwin and Weipa over the interval 26/1121-1510UT. MUFs are expected to be near predicted monthly values over 27-29 Apr.