[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 October 25 issued 2330 UT on 16 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 OCTOBER) 
Date   T index  Conditions    
16 Oct   113    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.7 15/2228UT  possible   lower  East Pacific/
                                    North American
  M1.3    1408UT  possible   lower  South American/
                                    Atlantic
  M1.1    1916UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 50% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   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 (17 OCTOBER - 19 OCTOBER)
Date   T index  Conditions       MUFs                              
17 Oct   105    Normal-fair      Near to 15% above predicted 
                                 monthly values
18 Oct   105    Normal           Near to 15% above predicted 
                                 monthly values    
19 Oct   100    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 94 was issued on 
15 October and is current for 15-17 Oct. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 16-Oct were near predicted 
monthly values to 20% enhanced. MUFs are expected to be generally 
near predicted monthly values over 17-19 Oct. 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