[Ips-dhfpr] ASWFC Daily HF Prop Report - 29 August 22 issued 2330 UT on 29 Aug 2022 [SEC=OFFICIAL]

Regional Warning Centre rwc at ips.gov.au
Tue Aug 30 09:30:53 EST 2022


SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/29 AUGUST 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (29 AUGUST) 
Date   T index  Conditions    
29 Aug    48    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M3.4    0338UT  possible   lower  E. Asia/Aust.
  M8.7    1107UT  probable   lower  European
  M2.6    1456UT  possible   lower  South American/
                                    Atlantic
  M2.6    1705UT  possible   lower  South American/
                                    Atlantic
  M4.7    1857UT  possible   lower  East Pacific/
                                    North American

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

PCA Event : No event.

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


2. FORECAST (30 AUGUST - 01 SEPTEMBER)
Date   T index  Conditions       MUFs                              
30 Aug    50    Normal-fair      Near predicted monthly values 
                                 to 20% depressed
31 Aug    60    Normal-fair      Near predicted monthly values    
01 Sep    60    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 65 was issued on 
29 August and is current for 29-31 Aug. Maximum usable frequencies 
(MUFs) on UT day 29-Aug were near predicted monthly to 25% depressed, 
particularly during local night. Spread F was observed at northern 
Australian sites over local night. Sporadic E was observed at 
most sites. Regional MUFs are expected to be mostly near predicted 
monthly values over 30-Aug to 01-Sep, with mild depressions possible 
on 30-Aug due to the combined effects of coronal hole high speed 
wind streams and a glancing blow from a CME first observed on 
27-Aug. Mild depressions are also possible during local night 
over 30-31 Aug.

----------------------------------------------------------
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



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