[Ips-dhfpr] SWS Daily HF Prop Report - 06 September 17 issued 2354 UT on 06 Sep 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/06 SEPTEMBER 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (06 SEPTEMBER) 
Date   T index  Conditions    
06 Sep    31    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M7.7    0928UT  probable   lower  Mid East/Indian
  X9.3    1202UT  probable   all    European
  M1.0    1731UT  possible   lower  South American/
                                    Atlantic
  M1.4    1931UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 30% after local dawn.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 30% during local night.
      Enhanced by 35% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
       Mostly near predicted monthly values.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 05 09 2017 1020UT and is in progress

Monthly T index:
Month  T index
Aug      10
Sep      5
Oct      4


2. FORECAST (07 SEPTEMBER - 09 SEPTEMBER)
Date   T index  Conditions       MUFs                              
07 Sep    20    Fair-normal      Near predicted monthly values
08 Sep     5    Fair-normal      Near predicted monthly values/depressed 
                                 20 to 30%    
09 Sep     0    Fair-normal      Near predicted monthly values/depressed 
                                 20 to 30%   

COMMENT: SWS Preliminary HF Communications Warning 37 was issued 
on 6 September and is current for 7-8 Sep. Maximum usable frequencies 
(MUFs) were near predicted monthly values to enhanced in the 
Aus/NZ region over the last 24 hours. Isolated periods of sporadic 
E were observed in some locations. Expect near predicted monthly 
values to enhanced in the Aus/NZ region today, 07 September. 
Followed by moderate MUF depressions on 08-09 September.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
http://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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