[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 August 24 issued 2335 UT on 21 Aug 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 AUGUST 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 AUGUST) 
Date   T index  Conditions    
21 Aug   162    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    0602UT  possible   lower  Mid East/Indian
  M5.1    2208UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 40% during local day.
      Enhanced by 55% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 65% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jul      131
Aug      119
Sep      119


2. FORECAST (22 AUGUST - 24 AUGUST)
Date   T index  Conditions       MUFs                              
22 Aug   160    Normal           15 to 25% above predicted monthly 
                                 values
23 Aug   160    Normal           15 to 25% above predicted monthly 
                                 values    
24 Aug   160    Normal           15 to 25% above predicted monthly 
                                 values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 21-Aug were 15-25% enhanced. Ionospheric scintillation 
was observed at Niue during the interval 21/0720-1040UT. Strong 
range spread was observed at Niue 21/0800UT and 1000UT. MUFs 
were strongly enhanced at Niue and Cocos Island during local 
night hours. MUFs are expected to be 15-25% enhanced over 22-24 
Aug. 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