[Ips-dhfpr] SWS Daily HF Prop Report - 19 April 20 issued 2331 UT on 19 Apr 2020

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 APRIL 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 APRIL) 
Date   T index  Conditions    
19 Apr     1    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 135% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Depressed by 20% during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values during daytime.
      Very weak F region at night.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      1
Apr      -14
May      -14


2. FORECAST (20 APRIL - 22 APRIL)
Date   T index  Conditions       MUFs                              
20 Apr     0    Normal           Near predicted monthly values
21 Apr    -5    Normal           Near predicted monthly values    
22 Apr     0    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) were near predicted 
monthly values with periods of minor to significant enhancements 
for the Australian region on UT day, 19 Apr. Hobart ionosphere 
very weak 16-20 UT. Sporadic-E was observed at Cocos 13-23 UT, 
Brisbane and Norfolk 00-03, 19-23 UT, Learmonth 10-18 UT, Sydney 
12-17, 20-23 UT. Spread F observed at Townsville and Brisbane 
13-18 UT, Learmonth 19-22 UT. MUFs in the Australian regions 
are expected to be mostly near predicted monthly values for the 
next three days, 20 to 22 Apr with possible mild depressions 
in MUFs on 21 Apr.

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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
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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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