[Ips-dhfpr] IPS Daily HF Prop Report - 20 April 14 issued 2330 UT on 20 Apr 2014

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 APRIL 2014 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 APRIL) 
Date   T index  Conditions    
20 Apr   127    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 50% during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 75% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 20% during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 1500UT 18/04, Ended at 1120UT 20/04

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


2. FORECAST (21 APRIL - 23 APRIL)
Date   T index  Conditions       MUFs                              
21 Apr   100    Normal           Near predicted monthly values
22 Apr   100    Normal           Near predicted monthly values    
23 Apr   100    Normal           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. 
Geomagnetic activity was observed in association with an anticipated 
CME impact however the activity was less than expected and the 
impacts on the ionosphere have been minor. No significant reduction 
in MUF for non-polar users is now expected from 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.

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