[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 July 24 issued 2330 UT on 30 Jul 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 JULY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 JULY) 
Date   T index  Conditions    
30 Jul   135    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.7    0103UT  possible   lower  West Pacific
  M1.5    0629UT  possible   lower  Mid East/Indian
  M1.5    1628UT  possible   lower  South American/
                                    Atlantic
  M1.9    1920UT  possible   lower  East Pacific/
                                    North American
  M9.5    1938UT  probable   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   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 (31 JULY - 02 AUGUST)
Date   T index  Conditions       MUFs                              
31 Jul   125    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
01 Aug   120    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values    
02 Aug   125    Normal           Depressed 10 to 15%/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 82 was issued on 29 July and is current for 30-31 Jul. 
Maximum usable frequencies (MUFs) in the Australian region were 
near predicted values to 25% enhanced. Sporadic E was observed 
in Canberra and Norfolk Island during local night hours. Scintillation 
was observed in Weipa between 29/2209 and 2348 UT. MUFs are expected 
to be near predicted values to 10-15% depressed over 31-Jul to 
02-Aug due to anticipated geomagnetic activity. Shortwave fadeouts 
are probable.

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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