[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 March 25 issued 2330 UT on 18 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 MARCH) 
Date   T index  Conditions    
18 Mar   141    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% 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 (19 MARCH - 21 MARCH)
Date   T index  Conditions       MUFs                              
19 Mar   150    Normal           Near to 15% above predicted 
                                 monthly values
20 Mar   140    Normal-fair      Near to 15% above predicted 
                                 monthly values    
21 Mar   150    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 18-Mar were 
near predicted values to enhanced by 20%. Sporadic-E and spread 
F were observed at Hobart. MUFs are expected to be near predicted 
monthly values to 15% enhanced over 19-21 Mar, with the chance 
of some minor degradations on 20-Mar due to possible geomagnetic 
activity. 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