Ionospheric Summary and Forecast
Ionospheric Summary
(last updated 14 Nov 2025 23:42 UT)
Date T index 14 Nov 91 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Niue Island Region: Enhanced by 20% during local day. Enhanced by 20% during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Depressed by 20% during local day. Near predicted monthly values during local night. Enhanced by 25% after local dawn. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Oct 104 Nov 89 Dec 90
Ionospheric Forecast
(last updated 14 Nov 2025 23:42 UT)
Date T index MUFs 15 Nov 100 Near predicted monthly values 16 Nov 90 Near predicted monthly values 17 Nov 100 Near predicted monthly values COMMENT: ASWFC SWF HF Communications Warning 111 was issued on 14 November and is current for 14-16 Nov. Maximum usable frequencies (MUFs) in the Australian region began the UT day 14-Nov depressed by 20% in the southern regions. Conditions improved to near predicted monthly values over the UT day. Spread-F was observed during local night hours in Hobart, and Sporadic-E was observed during local nigh hours at Norfolk Island, Niue, Brisbane and Townsville. MUFs are expected to be near predicted monthly values over 15-17 Nov, with mild depressions possible on 16-Nov due to anticipated geomagnetic activity. Shortwave fadeouts are probable.
