[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 February 24 issued 2341 UT on 21 Feb 2024 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 FEBRUARY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 FEBRUARY) 
Date   T index  Conditions    
21 Feb   127    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  X1.9    2307UT  probable   all    West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 45% during local night.
      Enhanced by 25% after local dawn.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   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
Jan      144
Feb      108
Mar      108


2. FORECAST (22 FEBRUARY - 24 FEBRUARY)
Date   T index  Conditions       MUFs                              
22 Feb   125    Normal           Near predicted monthly values
23 Feb   125    Normal           Near predicted monthly values    
24 Feb   125    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 21-Feb were 
near predicted monthly values to 15% in the Australian region. 
Ionospheric phase scintillation was observed at Darwin 21/14-15 
UT MUFs are expected to be near predicted monthly values to 15% 
enhanced over 22-24 Feb. Degraded HF conditions are expected 
on 25-Feb for the southern Australian region on 25-Feb due to 
an anticipated CME arrival.

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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