Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 13 Jul 2026 23:30 UT)

Date T index 13 Jul 60 Observed Australian Regional MUFs Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Near predicted monthly values during local day. Depressed by 25% during local night. Northern Australian Region: Near predicted monthly values during local day. Depressed by 20% during local night. Southern Australian Region: Mostly near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Jun 81 Jul 66 Aug 63

Ionospheric Forecast

(last updated 13 Jul 2026 23:30 UT)

Date T index MUFs 14 Jul 70 Near predicted monthly values to 15% depressed 15 Jul 75 Near predicted monthly values 16 Jul 75 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) in the Australian region on UT day 13-Jul were near predicted values to 20% depressed. HF conditions in most Australian sites were degraded during local dawn hours with significant spread-F. MUFs are expected to be mostly near predicted monthly values over 14-16 Jul, with residual depressions possible on 14-Jul up to 15%. Mildly degraded HF conditions are possible during local dawn hours.