[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 December 25 issued 2330 UT on 25 Dec 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 DECEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 DECEMBER) 
Date   T index  Conditions    
25 Dec   128    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Mostly 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
Nov      103
Dec      89
Jan      89


2. FORECAST (26 DECEMBER - 28 DECEMBER)
Date   T index  Conditions       MUFs                              
26 Dec   115    Normal           Near predicted monthly values 
                                 to 20% enhanced
27 Dec   115    Normal           Near predicted monthly values 
                                 to 20% enhanced    
28 Dec   115    Normal           Near predicted monthly values 
                                 to 20% enhanced   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region were near predicted values to 30% enhanced on UT day 25-Dec. 
Sporadic-E was observed in Perth over the day. MUFs are expected 
to be near predicted values to 20% enhanced over 26-28 Dec. Sporadic-E 
is still expected in local night hours, but may be on a declining 
trend.

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