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FORECAST SOL: Moderate yellow MAG: Normal green ION: Normal green
HomeHF SystemsAustralasiaHF ConditionsIonospheric Summary and Forecast Monday, May 27 2024 09:10 UT
Australasia

Ionospheric Summary and Forecast

Ionospheric Summary

(last updated 26 May 2024 23:30 UT)

Date T index 26 May 115 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values. Niue Island Region: Enhanced by 15% during local day. Depressed by 20% during local night. Northern Australian Region: Near predicted monthly values to 30% enhanced during local day. Depressed by 15-20% at times 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 Apr 125 May 114 Jun 116

Ionospheric Forecast

(last updated 26 May 2024 23:30 UT)

Date T index MUFs 27 May 125 Near to 15% above predicted monthly values 28 May 125 Near to 15% above predicted monthly values 29 May 125 Near to 15% above predicted monthly values COMMENT: ASWFC SWF HF Communications Warning 56 was issued on 26 May and is current for 26-28 May. Maximum usable frequencies (MUFs) in the Australian region on UT day 26-May were generally near predicted monthly values. Darwin MUFs were 30% enhanced during the local day. Spread F was observed at Hobart and Canberra during local night hours. Brief ionospheric equatorial scintillation was observed at Niue 26/0832-0850UT. MUFs are expected to be near predicted monthly values to 15% enhanced over 27-29 May. Shortwave fadeouts are possible.

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