[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 October 25 issued 2330 UT on 12 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 OCTOBER) 
Date   T index  Conditions    
12 Oct    71    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      109
Oct      89
Nov      89


2. FORECAST (13 OCTOBER - 15 OCTOBER)
Date   T index  Conditions       MUFs                              
13 Oct    80    Normal-fair      Southern Australian region 15-25% 
                                 depressed
14 Oct   105    Normal           Near predicted monthly values    
15 Oct   100    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 92 was issued on 12 
October and is current for 12-13 Oct. Maximum usable frequencies 
(MUFs) in the northern Australian region on UT day 12-Oct were 
near predicted monthly values. Southern Australian region MUFs 
were near predicted monthly values to 25% depressed during local 
day. Southern Australian region MUFs are expected to be 15-25% 
depressed on 13-Oct with northern Australian region MUFs generally 
expected to remain near predicted monthly values. MUFs are expected 
to recover to near predicted monthly values on 14-Oct. Shortwave 
fadeouts are possible.

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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