[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 April 24 issued 2330 UT on 27 Apr 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 APRIL 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 APRIL) 
Date   T index  Conditions    
27 Apr   134    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.1    1235UT  possible   lower  European
  M3.1    2140UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 60% during local night.
      Enhanced by 30% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values to 15% enhanced.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

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


2. FORECAST (28 APRIL - 30 APRIL)
Date   T index  Conditions       MUFs                              
28 Apr   140    Normal           About 15% above predicted monthly 
                                 values
29 Apr   140    Normal           About 15% above predicted monthly 
                                 values    
30 Apr   140    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 42 was issued on 
27 April and is current for 28-30 Apr. Maximum usable frequencies 
(MUFs) in the Australian region were near predicted monthly values 
to 15% enhanced on UT day 27-Apr. Strong enhancements were observed 
at Cocos Island during local night hours. Spread F was observed 
at Hobart during local night hours. Ionospheric scintillation 
was observed 27/1301-1430UT at Darwin and Weipa. MUFs are expected 
to be near predicted values over to 15% enhanced during the interval 
28-30 Apr. Isolated shortwave fadeouts are expected.

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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