[Ips-dhfpr] SWS Daily HF Prop Report - 21 February 19 issued 2330 UT on 21 Feb 2019 [SEC=UNCLASSIFIED]

Regional Warning Centre rwc at ips.gov.au
Fri Feb 22 10:30:22 EST 2019


SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 FEBRUARY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 FEBRUARY) 
Date   T index  Conditions    
21 Feb   -10    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 50% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   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
Jan      -27
Feb      -12
Mar      -13


2. FORECAST (22 FEBRUARY - 24 FEBRUARY)
Date   T index  Conditions       MUFs                              
22 Feb    -5    Normal           Near predicted monthly values
23 Feb   -10    Normal           Near predicted monthly values    
24 Feb   -15    Normal           Near predicted monthly values   

COMMENT: On UT day 21 February, MUFs were mostly near monthly 
predicted levels over the Australian region. In the Northern 
Australian region, moderate enhancements were observed during 
the local night. In the Cocos Island and Niue Island regions, 
mild to moderate depressions were observed during the local day. 
The Cocos Island region also experienced a short period of moderate 
enhancements in MUFs during the local day. Sporadic E layers 
were seen across the region. During the next three UT days, 22-24 
February, MUFs are expected to be mostly near monthly predicted 
levels. However, mild to moderate depressions are possible due 
to continued very low levels of ionising radiation from the Sun.

----------------------------------------------------------
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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