[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 January 23 issued 2330 UT on 25 Jan 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 JANUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 JANUARY) 
Date   T index  Conditions    
25 Jan   142    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M4.7    1011UT  possible   lower  European
  M1.4    1701UT  possible   lower  South American/
                                    Atlantic
  M2.0    2236UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 60% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 50% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Dec      84
Jan      71
Feb      72


2. FORECAST (26 JANUARY - 28 JANUARY)
Date   T index  Conditions       MUFs                              
26 Jan   125    Normal           Near to 20% above predicted 
                                 monthly values
27 Jan   115    Normal           Near to 20% above predicted 
                                 monthly values    
28 Jan   125    Normal           Near to 20% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 12 was issued on 
25 January and is current for 25-26 Jan. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 25-Jan were 20-30% 
enhanced in the Southern Australian region and 20-50% enhanced 
in the Northern Australia region. Sporadic E was observed across 
the Australian region during local night. Spread F was observed 
at Hobart during local night. MUFs are expected to be near predicted 
monthly values to 20% enhanced over 26-28 Jan. Shortwave fadeouts 
are possible. Sporadic E is possible during local night, affecting 
lower frequencies.

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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