[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 November 25 issued 2330 UT on 28 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 NOVEMBER) 
Date   T index  Conditions    
28 Nov    94    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M5.9    2222UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
   Niue Island Region:
      Enhanced by 20-25%.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Depressed 15-20% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed 20-30% 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
Oct      104
Nov      89
Dec      90


2. FORECAST (29 NOVEMBER - 01 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Nov    65    Normal           Depressed 15 to 20%/near predicted 
                                 monthly values
30 Nov    90    Normal           Near predicted monthly values    
01 Dec    90    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 112 was issued on 28 
November and is current for 29 Nov only. ASWFC SWF HF Communications 
Warning 113 was issued on 28 November and is current for 29 Nov 
to 1 Dec. Maximum usable frequencies (MUFs) in the Australian 
region on UT day 28-Nov were mostly near predicted monthly values 
to 15% enhanced, becoming depressed by 15-30% after local dawn 
this morning, possibly in association with mild overnight geomagnetic 
activity. Spread F was observed during local night hours at Hobart. 
Sporadic E was observed at times at Hobart and Niue. Australian 
region MUFs are expected to be initially depressed 15-20% on 
29-Nov, recovering as the day progresses. MUFs are expected to 
be near predicted monthly values during 30-Nov to 01-Dec. Isolated 
HF fadeouts are possible.

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