[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 November 25 issued 2333 UT on 13 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 NOVEMBER) 
Date   T index  Conditions    
13 Nov    40    Poor           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 30% during local day.
      Depressed by 45% during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 0950UT 11/11, Ended at 1550UT 13/11
 and, 100MeV Proton/PCA Event Began at 1010UT 11/11, Ended at 0215UT 13/11

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


2. FORECAST (14 NOVEMBER - 16 NOVEMBER)
Date   T index  Conditions       MUFs                              
14 Nov    60    Normal-fair      Depressed 15%/near predicted 
                                 monthly values
15 Nov    80    Normal           Near predicted monthly values    
16 Nov    80    Normal-fair      Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 13-Nov were depressed by 20-45%, particularly 
in the southern regions. Spread-F was observed during 
local night hours in Hobart, and Sporadic-E was observed in Perth. 
MUFs are expected to continue to experience 15-20% depressions 
on UT day 14-Nov, and near predicted monthly values over 15-16 
Nov. 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