[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 August 23 issued 2330 UT on 22 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

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

1. SUMMARY (22 AUGUST) 
Date   T index  Conditions    
22 Aug   122    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    2304UT  possible   lower  West Pacific

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

PCA Event : No event.

Monthly T index:
Month  T index
Jul      103
Aug      88
Sep      84


2. FORECAST (23 AUGUST - 25 AUGUST)
Date   T index  Conditions       MUFs                              
23 Aug   120    Normal           Near to 25% above predicted 
                                 monthly values
24 Aug   125    Normal           Near to 20% above predicted 
                                 monthly values    
25 Aug   125    Normal           Near to 20% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 81 was issued on 
22 August and is current for 23-24 Aug. Maximum usable frequencies 
on UT day 22-Aug were near predicted monthly values to 25% enhanced 
in the Australian region. Sporadic-E was observed in Brisbane, 
Townsville and Hobart during local night hours. Spread-F was 
observed in Townsville, Learmonth and Hobart during local night 
hours. MUFs are expected to be near predicted monthly values 
over 23-25 Aug with enhancements up to 25%. There is a slight
chance for shortwave fadeouts.

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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