[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 August 22 issued 2331 UT on 28 Aug 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 AUGUST 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 AUGUST) 
Date   T index  Conditions    
28 Aug    44    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0121UT  possible   lower  West Pacific
  M6.7    1619UT  probable   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 1150UT 27/08, Ended at 1830UT 27/08
 and, 10MeV Proton/PCA Event Began at 1915UT 27/08, Ended at 2125UT 27/08

Monthly T index:
Month  T index
Jul      65
Aug      67
Sep      68


2. FORECAST (29 AUGUST - 31 AUGUST)
Date   T index  Conditions       MUFs                              
29 Aug    50    Normal-fair      Near predicted monthly values
30 Aug    50    Normal           Near predicted monthly values    
31 Aug    50    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 28-Aug were 
near predicted monthly to 20% depressed, particularly during 
local night. Spread F was observed at Hobart, Brisbane and Townsville 
over local night. Sporadic E was observed at Cocos Island during 
local night. Regional MUFs are expected to be mostly near predicted 
monthly values over 29-31, with mild depressions possible on 
29-Aug due to the combined effects of coronal hole high speed 
wind streams and a possible glancing blow from a CME first observed 
on 27-Aug. Mild depressions are also possible during local night 
over 30-31 Aug.

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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