[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 February 25 issued 2331 UT on 09 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 FEBRUARY) 
Date   T index  Conditions    
09 Feb   111    Normal-fair    

Flares: none.

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

PCA Event : No event.

Monthly T index:
Month  T index
Jan      124
Feb      118
Mar      115


2. FORECAST (10 FEBRUARY - 12 FEBRUARY)
Date   T index  Conditions       MUFs                              
10 Feb   110    Fair             Depressed 5 to 15%/near predicted 
                                 monthly values
11 Feb   110    Normal-fair      Depressed 5 to 15%/near predicted 
                                 monthly values    
12 Feb   140    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 19 was issued on 
8 February and is current for 8-10 Feb. ASWFC HF Communications 
Warning 20 was issued on 9 February and is current for 9-11 Feb. 
Maximum usable frequencies (MUFs) in the southern Australian 
region were mostly near predicted monthly values to depressed 
by up to 25%. Enhancements of up to 25% were observed during 
local night in the northern Australian region but MUFs were mostly 
near predicted monthly values. Periods of sporadic E were observed 
at Brisbane and Norfolk Island. MUFs are expected to be near 
predicted monthly values to 15% depressed over 10-11 Feb, due 
to ongoing coronal hole high speed wind stream effects. MUFs 
are expected to be near predicted monthly values to 15% enhanced 
on 12-Feb. 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