[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 March 23 issued 2331 UT on 25 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 MARCH) 
Date   T index  Conditions    
25 Mar   139    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Enhanced by 35% during local day and after local dawn.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Enhanced by 35% during local day.
      Near predicted monthly values 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
Feb      117
Mar      80
Apr      80


2. FORECAST (26 MARCH - 28 MARCH)
Date   T index  Conditions       MUFs                              
26 Mar   130    Normal-fair      Near to 20% above predicted 
                                 monthly values
27 Mar   130    Normal-fair      Near to 20% above predicted 
                                 monthly values    
28 Mar   130    Normal           Near to 20% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 25-Mar in 
the Australian region were enhanced by 25-35% in Northern Australia 
and 35% enhanced in Southern Australia during local day. Spread 
F was observed at Hobart. Degraded HF conditions during local 
night hours are possible for southern Australia over 26-27 Mar 
due to a mild increase in geomagnetic activity from a broad solar 
coronal hole. MUFs are expected to be near predicted monthly 
values to 20% enhanced over 26-28 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