[Ips-dhfpr] SWS Daily HF Prop Report - 20 April 22 issued 2339 UT on 20 Apr 2022 [SEC=OFFICIAL]

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SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 APRIL 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 APRIL) 
Date   T index  Conditions    
20 Apr    77    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    0114UT  possible   lower  West Pacific
  M7.2    0136UT  probable   lower  West Pacific
  X2.2    0357UT  probable   all    E. Asia/Aust.
  M1.9    1253UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 50% during local day.
      Enhanced by 75% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 45% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      64
Apr      46
May      49


2. FORECAST (21 APRIL - 23 APRIL)
Date   T index  Conditions       MUFs                              
21 Apr    75    Normal           Near to 25% above predicted 
                                 monthly values
22 Apr    65    Normal           Near to 15% above predicted 
                                 monthly values    
23 Apr    65    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: SWS SWF HF Communications Warning 36 was issued on 18 
April and is current for 19-21 Apr. Maximum usable frequencies 
(MUFs) on UT day 20 Apr were enhanced over monthly predicted 
values. Spread-F was observed at Hobart 13-20 UT. MUFs are expected 
to be 15-25% enhanced over monthly predicted values during 21-23 
Apr. Short-wave fadeouts are likely.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
https://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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