[Ips-dhfpr] ASWFC Daily HF Prop Report - 20 February 25 issued 2331 UT on 20 Feb 2025 [SEC=OFFICIAL]

Australian Space Weather Forecasting Centre aswfc at bom.gov.au
Fri Feb 21 10:31:05 AEDT 2025


SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 FEBRUARY) 
Date   T index  Conditions    
20 Feb   155    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 60% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Enhanced by 20% 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 (21 FEBRUARY - 23 FEBRUARY)
Date   T index  Conditions       MUFs                              
21 Feb   145    Normal           Near to 15% above predicted 
                                 monthly values
22 Feb   145    Normal           Near to 15% above predicted 
                                 monthly values    
23 Feb   145    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 20-Feb in 
the Australian region were near predicted monthly to 20% enhanced. 
Mild spread F was observed during local night hours at Canberra 
and Hobart. Ionospheric equatorial scintillation was observed 
at Weipa during the interval 20/1053-1110UT. MUFs are expected 
to be near predicted monthly values to 15% enhanced over 21-23 
Feb.

----------------------------------------------------------
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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