[Ips-dhfpr] SWS Daily HF Prop Report - 25 September 19 issued 2331 UT on 25 Sep 2019

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 SEPTEMBER 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 SEPTEMBER) 
Date   T index  Conditions    
25 Sep    -6    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   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      -3
Sep      -14
Oct      -16


2. FORECAST (26 SEPTEMBER - 28 SEPTEMBER)
Date   T index  Conditions       MUFs                              
26 Sep    -5    Normal           Near predicted monthly values
27 Sep     5    Fair             Near to 15% above predicted 
                                 monthly values    
28 Sep    -5    Fair-poor        Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region were mostly near predicted monthly values during UT day 
25 September. Some periods of minor MUF enhancements and depressions 
were also observed. Sporadic-E and Spread-F occurrences were 
observed over some sites. For the next three UT days, 26-28 September, 
MUFs are expected to be mostly near predicted monthly values; 
moderately enhanced MUFs are likely for 27 September. Degraded 
HF propagation conditions are likely for 27-28 September as a 
consequences of the predicted increase in geomagnetic activity.

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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
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