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

[Regional Warning Centre]

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

1. SUMMARY (22 JULY) 
Date   T index  Conditions    
22 Jul   124    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M3.1    0337UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 45% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
      Enhanced by 25% 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
Jun      98
Jul      91
Aug      88


2. FORECAST (23 JULY - 25 JULY)
Date   T index  Conditions       MUFs                              
23 Jul   125    Normal           Near to 15% above predicted 
                                 monthly values
24 Jul   125    Normal           Near to 15% above predicted 
                                 monthly values    
25 Jul   125    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 68 was issued on 
22 July and is current for 22-23 Jul. Maximum usable frequencies 
(MUFs) on UT day 22-Jul were generally near predicted monthly 
values to 25% enhanced in the southern Australian region and 
near predicted monthly values to 20% enhanced in the northern 
Australian region. MUFs are expected to be near predicted monthly 
values to 15% enhanced on 23-25 Jul. Isolated 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