[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 January 23 issued 2330 UT on 21 Jan 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 JANUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 JANUARY) 
Date   T index  Conditions    
21 Jan   125    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 75% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night.
      Enhanced by 35% after local dawn.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% 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 (22 JANUARY - 24 JANUARY)
Date   T index  Conditions       MUFs                              
22 Jan   120    Normal           Near to 15% above predicted 
                                 monthly values
23 Jan   120    Normal           Near to 15% above predicted 
                                 monthly values    
24 Jan   120    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 21-Jan were 15-20% enhanced in the Southern 
Australian region and 15-35% enhanced in the Northern Australian 
region. Significant sporadic E was observed at Brisbane, Hobart, 
Learmonth and Perth during local night, with small amounts of 
sporadic E observed across the Australian region. MUFs are expected 
to be around 15% enhanced over 22-24 Jan, with a slight chance 
of depressed conditions over 23-24 Jan due to possible geomagnetic 
activity. 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