[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 February 24 issued 2330 UT on 25 Feb 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 FEBRUARY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 FEBRUARY) 
Date   T index  Conditions    
25 Feb   126    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    1722UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
      Enhanced by 35% after local dawn.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Enhanced by 15% during local day and night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jan      144
Feb      108
Mar      108


2. FORECAST (26 FEBRUARY - 28 FEBRUARY)
Date   T index  Conditions       MUFs                              
26 Feb   115    Normal-fair      Near predicted monthly values
27 Feb   115    Normal           Near predicted monthly values    
28 Feb   115    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 22 was issued on 
25 February and is current for 25-27 Feb. Maximum usable frequencies 
(MUFs) on UT day 25-Feb were near predicted monthly values to 
20% enhanced in the Australian region. Depressions of up to 25% 
have been observed after local dawn in the southern Australian 
region. Sporadic E was observed during local night hours at Hobart. 
Ionospheric scintillation was observed 25/1133-1150UT at Weipa. 
MUFs are expected to be near predicted monthly values over 26-28 
Feb. 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