[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 August 24 issued 2330 UT on 19 Aug 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 AUGUST 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 AUGUST) 
Date   T index  Conditions    
19 Aug   160    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0000UT  possible   lower  West Pacific
  M1.3    0936UT  possible   lower  Mid East/Indian
  M3.7    2152UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 105% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 75% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night and 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 (20 AUGUST - 22 AUGUST)
Date   T index  Conditions       MUFs                              
20 Aug   160    Normal           15 to 25% above predicted monthly 
                                 values
21 Aug   160    Normal           15 to 25% above predicted monthly 
                                 values    
22 Aug   160    Normal           15 to 25% above predicted monthly 
                                 values   

COMMENT: ASWFC SWF HF Communications Warning 93 was issued on 
18 August and is current for 18-20 Aug. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 19-Aug were near predicted 
monthly values to 25% enhanced. Spread F was observed at Hobart 
during local night hours. Ionospheric scintillation was observed 
at Niue and Weipa during the interval 19/0718-1120UT. MUFs are 
expected to be 15-25% enhanced over 20-22 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