[Ips-dhfpr] IPS Daily HF Prop Report - 18 April 14 issued 2346 UT on 18 Apr 2014

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 APRIL 2014 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 APRIL) 
Date   T index  Conditions    
18 Apr   121    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M7.3    1303UT  probable   lower  European

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 95% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : 10MeV Proton/PCA Event Began 19 04 2014 0100UT and is in progress

Monthly T index:
Month  T index
Mar      141
Apr      86
May      86


2. FORECAST (19 APRIL - 21 APRIL)
Date   T index  Conditions       MUFs                              
19 Apr   110    Normal           Near to 15% above predicted 
                                 monthly values
20 Apr    80    Fair-poor        Near predicted monthly values    
21 Apr    60    Fair             Depressed 15%/near predicted 
                                 monthly values   

COMMENT: IPS Preliminary HF Communications Warning 23 was issued 
on 18 April and is current for 20-22 Apr. HF propagation conditions 
are good with MUFs at or exceeding predicted monthly values. 
Significant geomagnetic activity is expected on the 20th and 
21st of April which is expected to impact the MUF for HF communication, 
particularly in polar southern and central Australia. IPS preliminary 
HF radio communications warning 14/23 has been issued and is 
current for this event.

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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.

IPS Radio and Space Services        email: asfc at ips.gov.au
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