[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 July 23 issued 2330 UT on 28 Jul 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 JULY) 
Date   T index  Conditions    
28 Jul   101    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.7 27/2235UT  possible   lower  East Pacific/
                                    North American
  M4.1    1558UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 55% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   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 (29 JULY - 31 JULY)
Date   T index  Conditions       MUFs                              
29 Jul   105    Normal           Near predicted monthly values
30 Jul   105    Normal           Near predicted monthly values    
31 Jul    10    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 28-Jul were 
mostly near predicted values. Spread-F was observed at Perth 
and Canberra during local night hours. MUFs are expected to bear 
near predicted values over 29-31 Jul. A slight chance for polar 
cap absorption (PCA) due to a possible S1 event may cause minor 
MUF depressions at high latitudes. 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