[Ips-dhfpr] SWS Daily HF Prop Report - 18 January 18 issued 2330 UT on 18 Jan 2018 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 JANUARY 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 JANUARY) 
Date   T index  Conditions    
18 Jan    -4    Normal-fair    

Flares: none.

MUFs:
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   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
Dec      -10
Jan      4
Feb      4


2. FORECAST (19 JANUARY - 21 JANUARY)
Date   T index  Conditions       MUFs                              
19 Jan     0    Normal-fair      Near predicted monthly values
20 Jan    -5    Fair             Near predicted monthly values/depressed 
                                 10 to 40%    
21 Jan    -5    Fair             Near predicted monthly values/depressed 
                                 10 to 40%   

COMMENT: Minor to moderate MUF depressions were observed across 
Aus/NZ regions today (UT day 18 January). Periods of Sporadic 
E blanketing were also evident. Mostly normal HF conditions may 
be expected in the region on 19 January with some possibility 
of minor MUF depressions as the solar activity is expected to 
stay at very low levels during this period, which may result 
in the weakening of ionising radiation. An expected rise in geomagnetic 
activity from late hours on 19 January and continued very low 
levels of solar activity may cause minor to significant MUF depressions 
in the region on 20 and 21 January.

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

IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information.  The views expressed in 
this message are those of the individual sender, unless 
specifically stated to be the views of SWS.  If you are not 
the intended recipient, please contact the sender immediately 
and delete all copies of this e-mail and attachments. 
To unsubscribe from an IPS mail list either send an email to 
"MAIL_LIST"-leave at ips.gov.au or go to
http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST".
Information about training can be obtained from
http://www.sws.bom.gov.au/mailman/listinfo/ips-training.
General information is available from
http://www.sws.bom.gov.au/mailman/listinfo/ips-info.