[Ips-dhfpr] SWS Daily HF Prop Report - 28 May 19 issued 2332 UT on 28 May 2019

Regional Warning Centre rwc at ips.gov.au
Wed May 29 09:32:04 EST 2019


SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 MAY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 MAY) 
Date   T index  Conditions    
28 May    -4    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Enhanced by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      1
May      -12
Jun      -12


2. FORECAST (29 MAY - 31 MAY)
Date   T index  Conditions       MUFs                              
29 May    -5    Normal           Near predicted monthly values
30 May   -10    Normal           Near predicted monthly values/depressed 
                                 10 to 20%    
31 May   -15    Normal           Near predicted monthly values/depressed 
                                 10 to 30%   

COMMENT: Maximum usable frequencies (MUFs) ranged mostly from 
near predicted monthly values to moderately enhanced ones for 
Australian regions and Antarctica. Variable conditions with mild 
enhancements and depressions were observed in Southern Australian 
regions. Notable periods of degraded ionospheric support for 
Antarctic regions over the UT day. Similar HF conditions are 
expected for the next 24 hours. Disturbed ionospheric support 
is expected for high latitudes on 29 May due to elevated geomagnetic 
activity on this day. Possible MUF depressions of 10%-30% for 
Australian regions are expected for 30-31 May as a consequence 
of the predicted increase in geomagnetic activity.

----------------------------------------------------------
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
PO Box 1386                         WWW: http://www.sws.bom.gov.au
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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