[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 February 23 issued 2330 UT on 22 Feb 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 FEBRUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 FEBRUARY) 
Date   T index  Conditions    
22 Feb   111    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    0506UT  possible   lower  E. Asia/Aust.
  M2.7    1350UT  possible   lower  European

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

PCA Event : No event.

Monthly T index:
Month  T index
Jan      119
Feb      75
Mar      76


2. FORECAST (23 FEBRUARY - 25 FEBRUARY)
Date   T index  Conditions       MUFs                              
23 Feb   110    Normal           Near to 15% above predicted 
                                 monthly values
24 Feb   110    Normal           Near to 15% above predicted 
                                 monthly values    
25 Feb   110    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 20 was issued on 
21 February and is current for 22-24 Feb. Maximum usable frequencies 
(MUFs) in the Southern Australian region on 22-Feb were near 
monthly predicted values to 20% enhanced. MUFs in the Northern 
Australian region were 15-20% enhanced. Significant sporadic 
E was observed at Brisbane and Norfolk Island during local night. 
Spread F was observed at Hobart during local night. MUFs are 
expected to be near predicted monthly values to 15% enhanced 
over 23-25 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