[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 November 25 issued 2330 UT on 18 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 NOVEMBER) 
Date   T index  Conditions    
18 Nov   114    Normal         

Flares: none.

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


2. FORECAST (19 NOVEMBER - 21 NOVEMBER)
Date   T index  Conditions       MUFs                              
19 Nov   115    Normal           Near to 15% above predicted 
                                 monthly values
20 Nov   115    Normal           Near to 15% above predicted 
                                 monthly values    
21 Nov   105    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) were largely near 
predicted monthly values in the Australian region, with 20-30% 
enhancements observed in the Northern Australian region. Spread-F 
was observed at Hobart during local night hours. MUFs are expected 
to be near predicted monthly values to enhanced by 15% over the 
period 19-21 Nov.

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