[Ips-dhfpr] SWS Daily HF Prop Report - 20 January 19 issued 2331 UT on 20 Jan 2019 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 JANUARY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 JANUARY) 
Date   T index  Conditions    
20 Jan   -31    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 30% during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Dec      -32
Jan      -12
Feb      -13


2. FORECAST (21 JANUARY - 23 JANUARY)
Date   T index  Conditions       MUFs                              
21 Jan   -30    Normal-fair      Depressed 15 to 30%/near predicted 
                                 monthly values
22 Jan   -30    Normal-fair      Depressed 15 to 30%/near predicted 
                                 monthly values    
23 Jan   -30    Fair             Near predicted monthly values/depressed 
                                 15 to 20%   

COMMENT: On UT day 20 January, the Australian and Antarctic regions 
experienced Mild MUF depressions, while the Cocos Island region 
had Moderate MUF depressions during the local day and Mild MUF 
depressions during the local night. Sporadic E layers were observed 
across all regions. Similar levels of ionospheric support are 
expected for the next 2 UT days, 21-22 January, with MUFs either 
near predicted monthly values or mildly to moderately depressed 
due to continued low levels of ionising radiation from the Sun. 
MUFs may be closer to near predicted monthly values on UT day 
23 January due to expected geomagnetic activity caused by coronal 
hole effects.

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