[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 January 25 issued 2330 UT on 19 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 JANUARY) 
Date   T index  Conditions    
19 Jan   126    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.4    0332UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   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 (20 JANUARY - 22 JANUARY)
Date   T index  Conditions       MUFs                              
20 Jan   115    Normal           Near predicted monthly values 
                                 to 15% depressed
21 Jan   115    Normal           Near predicted monthly values 
                                 to 15% depressed    
22 Jan   125    Normal           Near predicted monthly values   

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 on UT day 19-Jan were near predicted 
monthly values to 15% enhanced. Sporadic-E was observed in Hobart 
and Brisbane during local day hours. MUFs are expected to be 
near predicted monthly values to 15% depressed over 19-20 Jan, 
before depressions subside by 22-Jan.

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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