[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 May 25 issued 2331 UT on 09 May 2025 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Sat May 10 09:31:06 AEST 2025
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (09 MAY)
Date T index Conditions
09 May 98 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
Near predicted monthly values.
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 25% during local night.
Southern Australian Region:
Mostly near predicted monthly values.
Depressed by 25% after local dawn.
Antarctic Region (Casey/Davis/Mawson):
Depressed by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Apr 123
May 113
Jun 111
2. FORECAST (10 MAY - 12 MAY)
Date T index Conditions MUFs
10 May 95 Normal-fair Near predicted monthly values/depressed
10 to 15%
11 May 100 Normal Near predicted monthly values
12 May 100 Normal Near predicted monthly values
COMMENT: ASWFC HF Communications Warning 45 was issued on 7 May
and is current for 8-10 May. Maximum usable frequencies (MUFs)
in the Australian region on UT day 09-May were near predicted
monthly values to 25% depressed during local night. Spread F
was observed at Hobart and Canberra during local night hours.
MUFs are expected to be mostly near predicted monthly values
over 10-12 May, with further depressions possible on 10-May.
Minor shortwave fadeouts are possible.
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For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.
Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
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