Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 19 May 2022 23:31 UT)

Date T index 19 May 89 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 55% during local day. Enhanced by 50% during local night. Enhanced by 30% after local dawn. Niue Island Region: Enhanced by 20% during local day. Enhanced by 45% during local night. Northern Australian Region: Enhanced by 20% during local day. Enhanced by 20% during local night. Enhanced by 25% after local dawn. Southern Australian Region: Enhanced by 20% during local day. Enhanced by 20% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Enhanced by 30% over the UT day. Monthly T index: Month T index Apr 77 May 51 Jun 54

Ionospheric Forecast

(last updated 19 May 2022 23:31 UT)

Date T index MUFs 20 May 85 Near to 15% above predicted monthly values 21 May 85 Near to 15% above predicted monthly values 22 May 85 Near to 15% above predicted monthly values COMMENT: SWS SWF HF Communications Warning 45 was issued on 19 May and is current for 20-22 May. Maximum usable frequencies (MUFs) on UT day 19-May were near monthly predicted values to slightly enhanced. Spread-F was observed at Hobart during 1300-2100UT. MUFs are expected to be mostly near monthly predicted values to slightly enhanced during 20-22 May. Shortwave fadeouts are possible during this period.