[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 March 25 issued 2330 UT on 09 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 MARCH) 
Date   T index  Conditions    
09 Mar    64    Poor-fair      

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Depressed by 30% during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Depressed by 35% during local day.
      Depressed by 20% during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 35% over the UT day.

PCA Event : No event.

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


2. FORECAST (10 MARCH - 12 MARCH)
Date   T index  Conditions       MUFs                              
10 Mar    90    Fair             Depressed 15%/near predicted 
                                 monthly values
11 Mar   120    Normal-fair      Near predicted monthly values    
12 Mar   120    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 28 was issued on 9 March 
and is current for 9-10 Mar. Maximum usable frequencies (MUFs) 
on UT day 09-Mar in the Australian region were depressed by up 
to 35%, with the strongest depressions observed in the southern 
Australian region. Spread F was observed at Hobart and Perth 
during local night hours. Sporadic E was observed at Learmonth. 
MUFs are expected to be near predicted monthly values to depressed 
by 15% on 10-Mar. MUFs are expected to recover to near predicted 
monthly values over 11-12 Mar. 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