[Ips-dhfpr] ASWFC Daily HF Prop Report - 26 February 23 issued 2330 UT on 26 Feb 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/26 FEBRUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (26 FEBRUARY) 
Date   T index  Conditions    
26 Feb   135    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
      Enhanced by 95% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 40% during local night.
      Enhanced by 30% after local dawn.
   Southern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 2100UT 25-Feb, and has been
fluctuating between
10 pfu (the S1 threshold) since 1910 26-Feb. 

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


2. FORECAST (27 FEBRUARY - 01 MARCH)
Date   T index  Conditions       MUFs                              
27 Feb    60    Fair             Near predicted monthly values 
                                 to 20% depressed
28 Feb    60    Fair             Near predicted monthly values 
                                 to 20% depressed    
01 Mar    75    Fair-normal      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 22 was issued on 
24 February and is current for 25-27 Feb. ASWFC HF Communications 
Warning 23 was issued on 26 February and is current for 27-28 
Feb. Maximum usable frequencies (MUFs) in the Australian region 
on UT day 26-Feb were mostly 20-30% enhanced, and enhancements 
of up to 40% were observed in the northern Australian region 
during local night. Sporadic-E was briefly observed in most sites 
during local dawn. MUFs are expected to return to monthly expected 
values, with possible depressions up to 20%, due to geomagnetic 
activity over 27-Feb to 1-Mar. 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