[Ips-dhfpr] SWS Daily HF Prop Report - 09 September 17 issued 2354 UT on 09 Sep 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 SEPTEMBER 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 SEPTEMBER) 
Date   T index  Conditions    
09 Sep    16    Poor-fair      

Flares    Max     Fadeout    Freq.  Sectors
  M2.1 08/2346UT  possible   lower  West Pacific
  M1.0    0431UT  possible   lower  E. Asia/Aust.
  M3.7    1104UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
      Enhanced by 45% after local dawn.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 20% during local night.
      Enhanced by 45% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 0020UT 05/09, Ended at 1455UT 08/09
 and, 10MeV Proton/PCA Event Began at 1645UT 08/09, Ended at 2255UT 08/09

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


2. FORECAST (10 SEPTEMBER - 12 SEPTEMBER)
Date   T index  Conditions       MUFs                              
10 Sep   -10    Poor-fair        20 to 30% below predicted monthly 
                                 values
11 Sep     5    Normal-fair      Near predicted monthly values    
12 Sep     5    Normal-fair      Near predicted monthly values   

COMMENT: SWS HF Communications Warning 39 was issued on 7 September 
and is current for 8-10 Sep. Propagation conditions throughout 
the UT day were highly variable with enhancements from solar 
flare activity compounding with depressions due to geomagnetic 
activity. Disturbed periods observed for low to Mid latitudes. 
High latitudes experienced poor HF conditions. Notable instance 
of Sporadic E blaketing and strong spread F observed for all 
regions. Similar, yet improving conditions may be expected to 
prevail over the next 24 hours.

----------------------------------------------------------
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
PO Box 1386                         WWW: http://www.sws.bom.gov.au
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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