[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 January 23 issued 2331 UT on 18 Jan 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 JANUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 JANUARY) 
Date   T index  Conditions    
18 Jan   143    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.8    1035UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
      Enhanced by 25% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 45% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
      Enhanced by 35% after local dawn.
   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 (19 JANUARY - 21 JANUARY)
Date   T index  Conditions       MUFs                              
19 Jan   130    Normal-fair      Near to 15% above predicted 
                                 monthly values
20 Jan   130    Normal           Near to 15% above predicted 
                                 monthly values    
21 Jan   130    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 9 was issued on 
18 January and is current for 18-20 Jan. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 18-Jan were near predicted 
monthly values to 45% enhanced in Northern Australia during local 
night. Sporadic E was observed at Brisbane and Perth. MUFs are 
expected to be near predicted monthly values to 15% enhanced 
over 19-21 Jan. Mild degradations due to increased geomagnetic 
activity are possible on 19-Jan. 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