[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 April 24 issued 2330 UT on 22 Apr 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 APRIL 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 APRIL) 
Date   T index  Conditions    
22 Apr   138    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0813UT  possible   lower  Mid East/Indian
  M1.6    1335UT  possible   lower  European
  M2.8    1550UT  possible   lower  South American/
                                    Atlantic
  M1.6    2116UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      120
Apr      114
May      115


2. FORECAST (23 APRIL - 25 APRIL)
Date   T index  Conditions       MUFs                              
23 Apr   135    Normal           Near to 15% above predicted 
                                 monthly values
24 Apr   135    Normal           Near to 15% above predicted 
                                 monthly values    
25 Apr   135    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 40 was issued on 
21 April and is current for 22-24 Apr. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 22-Apr were mostly 
near predicted monthly values. Spread-F was observed at Canberra 
during local night hours. Periods of sporadic-E were observed 
at Hobart and Perth. MUFs in the Australian region are expected 
to be near predicted monthly values to 15% enhanced over 23-25 
Apr. Shortwave fadeouts are possible.

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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.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au