[Ips-dhfpr] SWS Daily HF Prop Report - 28 September 17 issued 2349 UT on 28 Sep 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 SEPTEMBER 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 SEPTEMBER) 
Date   T index  Conditions    
28 Sep    21    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

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


2. FORECAST (29 SEPTEMBER - 01 OCTOBER)
Date   T index  Conditions       MUFs                              
29 Sep    15    Fair             Near predicted monthly values
30 Sep    10    Normal-fair      Near predicted monthly values    
01 Oct     5    Normal           Near predicted monthly values   

COMMENT: SWS HF Communications Warning 42 was issued on 28 September 
and is current for 28-29 Sep. Over the last 24 hours, MUFs were 
mainly near predicted monthly values across most of the Australian/NZ 
and Antarctic Regions. MUFs were enhanced in the Niue Island 
Region across the local day and night, and in the Northern Australian 
Region during the local night. Some periods of minor depressions 
were observed. Sporadic E was also observed. The two day outlook 
(29-30 September) is for the MUFs to be mainly near monthly values, 
but depressed compared with the previous day's conditions (27 
September). Minor depressions are possible at mid to high latitudes. 
This is in response to the recent Active to Minor-Major Storm 
geomagnetic conditions associated with the passage of a coronal 
hole.

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