Ionospheric Summary and Forecast
Ionospheric Summary
(last updated 07 Jul 2025 23:32 UT)
Date T index 07 Jul 83 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Depressed by 30% during local night. Niue Island Region: Near predicted monthly values during local day. Depressed by 30% during local night. Northern Australian Region: Near predicted monthly values during local day. Depressed by 20% during local night. Depressed by 20% after local dawn. Southern Australian Region: Near predicted monthly values during local day. Depressed by 15% during local night. Antarctic Region (Casey/Davis/Mawson): Depressed by 30% over the UT day. Monthly T index: Month T index Jun 79 Jul 104 Aug 102
Ionospheric Forecast
(last updated 07 Jul 2025 23:32 UT)
Date T index MUFs 08 Jul 90 Near predicted monthly values 09 Jul 90 Near predicted monthly values 10 Jul 80 Depressed 10 to 15%/near predicted monthly values COMMENT: ASWFC HF Communications Warning 69 was issued on 7 July and is current for 7-8 Jul. Maximum usable frequencies (MUFs) in the Australian region on UT day 7-Jul were depressed 20% to near predicted values. Spread-F was observed at Hobart during local night hours. Persistent blanketing sporadic E observed at Mawson in Antarctica. MUFs are expected to be generally near predicted values with the chance of mildly depressed MUFs in the southern Australian region on 10-Jul.
