Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 19 Jan 2025 23:30 UT)

Date T index 19 Jan 126 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 20% during local day. Near predicted monthly values during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 15% 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 Dec 132 Jan 119 Feb 116

Ionospheric Forecast

(last updated 19 Jan 2025 23:30 UT)

Date T index MUFs 20 Jan 115 Near predicted monthly values to 15% depressed 21 Jan 115 Near predicted monthly values to 15% depressed 22 Jan 125 Near predicted monthly values COMMENT: ASWFC SWF HF Communications Warning 10 was issued on 17 January and is current for 18-20 Jan. Maximum usable frequencies (MUFs) in the Australian region on UT day 19-Jan were near predicted monthly values to 15% enhanced. Sporadic-E was observed in Hobart and Brisbane during local day hours. MUFs are expected to be near predicted monthly values to 15% depressed over 19-20 Jan, before depressions subside by 22-Jan.