[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 March 23 issued 2330 UT on 24 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 MARCH) 
Date   T index  Conditions    
24 Mar    89    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
      Enhanced by 60% after local dawn.
   Niue Island Region:
      Enhanced by 30% over the UT day.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
      Enhanced by 45% after local dawn.
   Southern Australian Region:
      Depressed by 40% during local day.
      Near predicted monthly values during local night.
      Enhanced by 40% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 35% over the UT day.

PCA Event : No event.

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


2. FORECAST (25 MARCH - 27 MARCH)
Date   T index  Conditions       MUFs                              
25 Mar   105    Fair             Near to 15% above predicted 
                                 monthly values
26 Mar   105    Normal-fair      Near to 15% above predicted 
                                 monthly values    
27 Mar   105    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 24-Mar in 
the Australian region were generally enhanced by 15-40% in Northern 
Australia and 40% depressed in Southern Australia during local 
day. Strong spread F was observed at Hobart. Degraded HF conditions 
during local night hours for southern region Australia are possible 
over 25-27 Mar due to an expected extended interval of mildly 
increased geomagnetic activity from a broad solar coronal hole. 
MUFs are expected to be near predicted monthly values to 15% 
enhanced over 25-27 Mar.

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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