[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 October 25 issued 2330 UT on 09 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 OCTOBER) 
Date   T index  Conditions    
09 Oct   111    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    1231UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 40% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 50% during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Enhanced by 20%.
   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
Sep      109
Oct      89
Nov      89


2. FORECAST (10 OCTOBER - 12 OCTOBER)
Date   T index  Conditions       MUFs                              
10 Oct   100    Normal           Near predicted monthly values 
                                 to 15% enhanced
11 Oct   100    Normal-fair      Near predicted monthly values 
                                 to 15% enhanced    
12 Oct    80    Fair             Southern Australian region 15% 
                                 depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 09-Oct were near predicted values to 20% enhanced. 
Spread-F was observed at Hobart during local night hours. MUFs 
are expected to be mostly near predicted values to 15% enhanced 
over 10-11 Oct. Southern Australian region HF conditions may 
become degraded late in the UT day on 11-Oct in association with 
coronal hole wind stream induced geomagnetic activity. The southern 
Australian region MUFs may become 15% depressed at times during 
12-13 Oct with northern Australian region MUFs generally expected 
to remain near predicted monthly values to 15% enhanced.

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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