[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 March 25 issued 2331 UT on 25 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 MARCH) 
Date   T index  Conditions    
25 Mar   130    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
      Enhanced by 50% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   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 (26 MARCH - 28 MARCH)
Date   T index  Conditions       MUFs                              
26 Mar   115    Normal           Near predicted monthly values 
                                 to 10-15% depressed
27 Mar   110    Normal-fair      Near predicted monthly values 
                                 to 10-15% depressed    
28 Mar   105    Fair             Near predicted monthly values 
                                 to 10-20% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 25-Mar were near predicted values. Persistent 
sporadic-E was observed in all low latitudes stations during 
local night hours. Spread-F was observed in Hobart. MUFs are 
expected to be mostly near predicted monthly values on UT day 
26-Mar, with mild depressions setting in possibly late in the 
day. Depressions are expected to deepen over 27-28 Mar. Spread-F 
is possible at high latitudes during local night hours.

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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