Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 08 Jun 2026 23:30 UT)

Date T index 08 Jun 83 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 20% during local day. Enhanced by 30% during local night. Northern Australian Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Southern Australian Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index May 67 Jun 68 Jul 65

Ionospheric Forecast

(last updated 08 Jun 2026 23:30 UT)

Date T index MUFs 09 Jun 75 Near predicted monthly values 10 Jun 75 Near predicted monthly values 11 Jun 65 Near predicted monthly values COMMENT: ASWFC Preliminary HF Communications Warning 53 was issued on 6 June and is current for 8-10 Jun. Maximum usable frequencies (MUFs) in the Australian region were near predicted values to 15% enhanced during local day hours. Spread F was observed at Hobart during local night hours and sporadic E with degraded signal with observed at Darwin during local night hours. MUFs are expected to be mostly near predicted monthly values over 09-11 Jun, with a chance of depressions on 09-10 Jun should geomagnetic activity eventuate on 09-Jun.