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

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (18 JANUARY) 
Date   T index  Conditions    
18 Jan   106    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0 17/2205UT  possible   lower  East Pacific/
                                    North American
  M1.7    0058UT  possible   lower  West Pacific
  M1.1    0307UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values 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
Dec      132
Jan      119
Feb      116


2. FORECAST (19 JANUARY - 21 JANUARY)
Date   T index  Conditions       MUFs                              
19 Jan   105    Normal           20% depressed to near predicted 
                                 monthly values
20 Jan   105    Normal-fair      20% depressed to near predicted 
                                 monthly values    
21 Jan   110    Normal           Near predicted monthly values 
                                 to 20% depressed   

COMMENT: ASWFC SWF HF Communications Warning 10 was issued on 
17 January and is current for 18-20 Jan. Maximum usable frequencies 
(MUFs) in the Australian region were near predicted values to 
20% depressed. MUFs are expected to be near predicted values 
to 20% depressed over 19-21 Jan, although may begin improving 
by the end of the period.

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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