[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 February 25 issued 2330 UT on 10 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/10 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (10 FEBRUARY) 
Date   T index  Conditions    
10 Feb    86    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0046UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values 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
Jan      124
Feb      118
Mar      115


2. FORECAST (11 FEBRUARY - 13 FEBRUARY)
Date   T index  Conditions       MUFs                              
11 Feb    95    Normal           Depressed 15%/near predicted 
                                 monthly values
12 Feb   115    Normal           Near predicted monthly values    
13 Feb   115    Normal           Near predicted monthly values   

COMMENT: 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 25% depressed during local 
day. MUFs were mostly near predicted monthly values in the northern 
Australian region. Spread F was observed at Hobart during local 
night hours. MUFs are expected to be near predicted monthly values 
to 15% depressed on 11-Feb due to a mild increase in geomagnetic 
activity. MUFs are expected to be near predicted monthly values 
over 12-13 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