[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 February 23 issued 2332 UT on 12 Feb 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 FEBRUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 FEBRUARY) 
Date   T index  Conditions    
12 Feb   126    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M3.2    0848UT  possible   lower  Mid East/Indian
  M1.5    0927UT  possible   lower  Mid East/Indian
  M1.2    1334UT  possible   lower  European
  M1.1    1538UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 20-40%.
   Niue Island Region:
      Enhanced by 15-35%.
   Northern Australian Region:
      Enhanced by 30-55%.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Depressed by 10-20% 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 (13 FEBRUARY - 15 FEBRUARY)
Date   T index  Conditions       MUFs                              
13 Feb   100    Normal           Near to 15% above predicted 
                                 monthly values
14 Feb   100    Normal-fair      Near to 15% predicted monthly 
                                 values, becoming degraded late 
                                 in UT day.    
15 Feb    80    Fair-normal      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 15 was issued on 
10 February and is current for 11-13 Feb. Maximum usable frequencies 
(MUFs) in the Australian region were near predicted monthly values 
to 55% enhanced on UT day 12-Feb. Southeast Australian ionosonde 
stations are showing 10-20% depressed MUFs after local dawn this 
morning which are not expected to persist. MUFs are generally 
expected to be near predicted monthly values to 15% enhanced. 
Shortwave fadeouts are probable. Degraded HF conditions for the 
southern Australian region may be experienced from late 14-15 
Feb due to the anticipated arrival of a CME.

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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