[Ips-dhfpr] ASWFC Daily HF Prop Report - 31 July 24 issued 2330 UT on 31 Jul 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/31 JULY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (31 JULY) 
Date   T index  Conditions    
31 Jul   143    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.9    0150UT  possible   lower  West Pacific
  M4.8    0523UT  possible   lower  E. Asia/Aust.
  M7.7    0646UT  probable   lower  Mid East/Indian
  M6.0    1305UT  probable   lower  European
  M1.4    1631UT  possible   lower  South American/
                                    Atlantic
  M5.4    1837UT  possible   lower  East Pacific/
                                    North American
  M1.2    2155UT  possible   lower  East Pacific/
                                    North American
  M1.0    2250UT  possible   lower  East Pacific/
                                    North American

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

PCA Event : No event.

Monthly T index:
Month  T index
Jun      120
Jul      118
Aug      117


2. FORECAST (01 AUGUST - 03 AUGUST)
Date   T index  Conditions       MUFs                              
01 Aug   125    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
02 Aug   130    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values    
03 Aug   135    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 80 was issued 
on 28 July and is current for 31 Jul to 1 Aug. ASWFC SWF HF Communications 
Warning 83 was issued on 31 July and is current for 1-2 Aug. 
Maximum usable frequencies (MUFs) on UT day 31-Jul were mostly 
near predicted values to 20% enhanced. Sporadic E was observed 
in Townsville during local night hours. Spread F was observed 
in Niue during local night hours. Conditions in Brisbane were 
generally degraded. Scintillation was observed in Niue, Darwin 
and Weipa from 0727 to 1250 UT. MUFs are expected to be near 
predicted values over 01-03 Aug, with 10-15% depressions possible 
for mid and high latitudes.

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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