[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 March 26 issued 2330 UT on 27 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 MARCH) 
Date   T index  Conditions    
27 Mar    96    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Generally near predicted monthly values during
      the local night, with only Darwin enhanced 50%.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      98
Mar      87
Apr      85


2. FORECAST (28 MARCH - 30 MARCH)
Date   T index  Conditions       MUFs                              
28 Mar    95    Normal           Near predicted monthly values
29 Mar    95    Normal           Near predicted monthly values    
30 Mar    80    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region were generally near predicted values to 20% enhanced. 
Strong enhancements of up to 50% were observed at Darwin during 
the local night. Scintillation was observed during the interval 
27/1130-1155UT at Darwin. Spread F was observed at Hobart and 
Brisbane during local night hours. MUFs are expected to be near 
predicted monthly values for 28-29-Mar. Southern Australian region 
MUFs may become 15% depressed during 30-31 Mar in association 
with mild geomagnetic activity associated with a coronal hole 
wind stream.

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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