[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 September 22 issued 2330 UT on 17 Sep 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 SEPTEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 SEPTEMBER) 
Date   T index  Conditions    
17 Sep    77    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1319UT  possible   lower  European
  M1.9    1339UT  possible   lower  European
  M2.6    2041UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 45% during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      53
Sep      68
Oct      69


2. FORECAST (18 SEPTEMBER - 20 SEPTEMBER)
Date   T index  Conditions       MUFs                              
18 Sep    65    Normal-fair      Near predicted monthly values
19 Sep    65    Normal-fair      Near predicted monthly values    
20 Sep    70    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 71 was issued on 
17 September and is current for 18-19 Sep. Maximum usable frequencies 
(MUFs) on UT day 17-Sep were mostly near predicted monthly values 
to 30% enhanced, particularly at local night hours. Sporadic-E 
was observed at most northern region sites during local night 
hours. Regional MUFs are expected to be near predicted monthly 
values on 18-19 Sep, with mild depressions possible during local 
night due to a possible glancing blow from a CME first observed 
on 16-Sep. MUFs are expected to be near predicted monthly values 
on 20-Sep.

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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