Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 12 May 2024 23:30 UT)

Date T index 12 May 143 Observed Australian Regional MUFs Cocos Island Region: Mostly near predicted monthly values. Enhanced by 120% after local dawn. Niue Island Region: Enhanced by 20% during local day. Near predicted monthly values during local night. Northern Australian Region: Enhanced by 25% during local day. Enhanced by 20% during local night. Southern Australian Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Antarctic Region (Casey/Davis/Mawson): Depressed by 35% over the UT day. Absorption observed at times. Monthly T index: Month T index Apr 125 May 114 Jun 116

Ionospheric Forecast

(last updated 12 May 2024 23:30 UT)

Date T index MUFs 13 May 120 Near predicted monthly values 14 May 120 Near predicted monthly values 15 May 120 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) on UT day 12-May were near predicted monthly values to 25% enhanced. Spread F was observed at Hobart during local night hours. Ionospheric scintillation was observed at Darwin, Weipa and Niue 11/1139-2040UT. A shortwave fadeout was observed in the Australian region 11/0101-0405UT. MUFs are now expected to be near predicted monthly values to 15% enhanced over 13-15 May. Shortwave fadeouts are expected.