Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 23 Apr 2024 23:30 UT)

Date T index 23 Apr 142 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 80% during local night. Enhanced by 20% after local dawn. Niue Island Region: Enhanced by 20% during local day. Enhanced by 40% during local night. Northern Australian Region: Mostly near predicted monthly values. Enhanced by 20% after local dawn. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 120 Apr 114 May 115

Ionospheric Forecast

(last updated 23 Apr 2024 23:30 UT)

Date T index MUFs 24 Apr 140 Near to 15% above predicted monthly values 25 Apr 140 Near to 15% above predicted monthly values 26 Apr 140 Near to 15% above predicted monthly values COMMENT: ASWFC SWF HF Communications Warning 40 was issued on 21 April and is current for 22-24 Apr. Maximum usable frequencies (MUFs) in the Australian region on UT day 23-Apr were near predicted monthly values to 15-20% enhanced. Spread-F was observed at Hobart and Perth during local night hours. MUFs in the Australian region are expected to be near predicted monthly values to 15% enhanced over 24-26 Apr. Shortwave fadeouts are possible.