[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 January 25 issued 2330 UT on 17 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 JANUARY) 
Date   T index  Conditions    
17 Jan   108    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    0212UT  possible   lower  E. Asia/Aust.
  M1.1    0320UT  possible   lower  E. Asia/Aust.
  M2.0    0919UT  possible   lower  Mid East/Indian
  M1.5    1137UT  possible   lower  European
  M7.4    1335UT  probable   lower  European
  M2.1    1850UT  possible   lower  East Pacific/
                                    North American
  M1.8    1949UT  possible   lower  East Pacific/
                                    North American
  M1.0    2205UT  possible   lower  East Pacific/
                                    North American

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

PCA Event : No event.

Monthly T index:
Month  T index
Dec      132
Jan      119
Feb      116


2. FORECAST (18 JANUARY - 20 JANUARY)
Date   T index  Conditions       MUFs                              
18 Jan   105    Normal           20% depressed to near predicted 
                                 monthly values
19 Jan   105    Normal           20% depressed to near predicted 
                                 monthly values    
20 Jan   105    Normal           20% depressed to near predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 8 was issued on 
16 January and is current for 17-19 Jan. Maximum usable frequencies 
(MUFs) in the Australian region were 20% depressed to 25% enhanced. 
Conditions in Hobart were degraded during local night hours. 
MUfs are expected to be near predicted values to 20% depressed 
over 18-20 Jan, as continued coronal hole effects may impact 
HF circuits.

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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