[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 January 23 issued 2331 UT on 22 Jan 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 JANUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 JANUARY) 
Date   T index  Conditions    
22 Jan   130    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1226UT  possible   lower  European
  M1.6    1702UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 40% during local day.
      Enhanced by 50% during local night.
      Enhanced by 30% after local dawn.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 55% during local night.
   Southern Australian Region:
      Near predicted monthly values 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 (23 JANUARY - 25 JANUARY)
Date   T index  Conditions       MUFs                              
23 Jan   135    Normal           Near to 15% above predicted 
                                 monthly values
24 Jan   130    Normal-fair      Near to 15% above predicted 
                                 monthly values    
25 Jan   120    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 11 was issued on 
22 January and is current for 23-24 Jan. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 22-Jan were near predicted 
monthly values to 20% enhanced in the Southern Australian region 
and 25-55% enhanced in the Northern Australian region. Significant 
sporadic E was observed across the Southern Australian region 
and the majority of the Northern Australian region during local 
night. Spread F was observed at Hobart. MUFs are expected to 
be near predicted monthly values to 15% enhanced over 23-25 Jan 
with more significant enhancements expected for the Northern 
Australian region. There is 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