[Ips-dhfpr] ASWFC Daily HF Prop Report - 01 December 25 issued 2321 UT on 01 Dec 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 DECEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 DECEMBER) 
Date   T index  Conditions    
01 Dec   127    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced 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
Nov      103
Dec      89
Jan      89


2. FORECAST (02 DECEMBER - 04 DECEMBER)
Date   T index  Conditions       MUFs                              
02 Dec   110    Normal           Near to 15% above predicted 
                                 monthly values
03 Dec   110    Normal           Near to 15% above predicted 
                                 monthly values    
04 Dec    90    Normal-fair      Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 01-Dec were mostly near predicted monthly values. 
Niue and Norfolk experienced extended periods of sporadic-E. 
MUFs are forecast to continue to be near predicted monthly values 
during 01-03 Dec. Shortwave fadeouts are likely on daylight HF 
circuits.

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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