[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 May 26 issued 2332 UT on 12 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 MAY) 
Date   T index  Conditions    
12 May    53    Fair           

Flares: none.

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 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      74
May      71
Jun      68


2. FORECAST (13 MAY - 15 MAY)
Date   T index  Conditions       MUFs                              
13 May    60    Normal-fair      Near predicted monthly values
14 May    60    Normal-fair      Near predicted monthly values    
15 May    45    Fair-normal      Depressed 15 to 20%/near predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 47 was issued on 
10 May and is current for 11-13 May. Maximum Usable Frequencies 
(MUFs) were near predicted values during daylight hours in the 
Australian region during 12-May. Depressions of 15-25% were observed 
during local night hours. Spread-F was also observed across multiple 
sites in the Australian region during local night hours. MUFs 
are expected to be near predicted values over 13-14 May, with 
some depressions possible during night hours. Depressions of 
15-25% are possible during the second half of 15-May, due to 
forecast geomagnetic activity. 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