[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 November 25 issued 2347 UT on 10 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (10 NOVEMBER) 
Date   T index  Conditions    
10 Nov   135    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  X1.2    0919UT  probable   all    Mid East/Indian
  M1.5    1958UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 40% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
      Depressed by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 10 11 2025 1115UT and is in progress

Monthly T index:
Month  T index
Oct      104
Nov      89
Dec      90


2. FORECAST (11 NOVEMBER - 13 NOVEMBER)
Date   T index  Conditions       MUFs                              
11 Nov    90    Normal-fair      Near predicted monthly values
12 Nov    50    Poor             15 to 20% below predicted monthly 
                                 values    
13 Nov    65    Fair             Depressed 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 107 was 
issued on 10 November and is current for 11-13 Nov. Maximum usable 
frequencies (MUFs) in the Northern Australian region on UT day 
10-Nov were up to 30% enhanced during local night. MUFs in the 
Southern Australian region were up to 15% enhanced. Spread F 
was observed at Hobart during local night hours. MUFs are expected 
to be near predicted monthly values on 11-Nov. MUFs over 12-13 
Nov are expected to be near predicted monthly values to 20% depressed, 
due to anticipated geomagnetic activity. Shortwave fadeouts are 
probable.

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