[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 March 23 issued 2331 UT on 22 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

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

1. SUMMARY (22 MARCH) 
Date   T index  Conditions    
22 Mar   143    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 20-45%.
   Niue Island Region:
      Enhanced by 20-30%.
   Northern Australian Region:
      Enhanced by 25-60%.
   Southern Australian Region:
      Enhanced by 30%.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day. 
      Mildly elevated absorption observed at times.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      117
Mar      80
Apr      80


2. FORECAST (23 MARCH - 25 MARCH)
Date   T index  Conditions       MUFs                              
23 Mar   125    Fair-normal      20% enhanced to near predicated 
                                 monthly values
24 Mar   125    Fair-normal      20% enhanced to near predicated 
                                 monthly values    
25 Mar   125    Fair-normal      20% enhanced to near predicated 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 22-Mar in 
the Australian region were enhanced by 20-60%. Mild spread F 
was observed at Hobart during local night hours. MUFs are expected 
to be enhanced by 20-30% over the next three days. Degraded HF 
conditions during local night hours for southern region Australia 
are possible in coming days due to an expected extended interval 
of mildly increased geomagnetic activity from a broad solar coronal 
hole. Isolated minor 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