[Ips-dhfpr] IPS Daily HF Prop Report - 20 July 15 issued 2335 UT on 20 Jul 2015

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 JULY 2015 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 JULY) 
Date   T index  Conditions    
20 Jul    47    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night and after 
      local dawn.
   Niue Island Region:
      Depressed by 25%.
   Northern Australian Region:
      Depressed by 25% during local day.
      Depressed by 35% during local night.
      Depressed by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jun      70
Jul      84
Aug      82


2. FORECAST (21 JULY - 23 JULY)
Date   T index  Conditions       MUFs                              
21 Jul    50    Normal           15 to 20% below predicted monthly 
                                 values
22 Jul    50    Normal           15 to 20% below predicted monthly 
                                 values    
23 Jul    60    Normal           10 to 20% below predicted monthly 
                                 values   

COMMENT: IPS HF Communications Warning 25 was issued on 20 July 
and is current for 21-23 Jul. MUF depressions of up to 30% have 
been seen across much of the Australian region over the last 
24 hours. These conditions are due to low levels of ionising 
solar flux. IPS HF Warning 15/25 has been issued as a continuation 
of HF Warning 15/24.

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

Space Weather Services              email: asfc at ips.gov.au
Bureau of Meteorology
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