[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 March 25 issued 2334 UT on 22 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 MARCH) 
Date   T index  Conditions    
22 Mar   152    Fair-normal    

Flares: none.

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

PCA Event : No event.

Monthly T index:
Month  T index
Feb      127
Mar      117
Apr      114


2. FORECAST (23 MARCH - 25 MARCH)
Date   T index  Conditions       MUFs                              
23 Mar   140    Normal-poor      Near predicted monthly values 
                                 to 15% enhanced
24 Mar    90    Poor-Fair        Depressed 15 to 20%/near predicted 
                                 monthly values    
25 Mar   125    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 22-Mar were near predicted values to 40% enhanced. 
Spread-F was observed in Hobart during local night hours. MUFs 
are expected to be initially near predicted values to 15% enhanced 
on 23-Mar, with degraded conditions expected in the second half 
of the UT day due to increased geomagnetic activity from an anticipated 
CME arrival. Depressed conditions are possible on 24-Mar if geomagnetic 
activity eventuates.

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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