[Ips-dhfpr] ASWFC Daily HF Prop Report - 20 March 25 issued 2331 UT on 20 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 MARCH) 
Date   T index  Conditions    
20 Mar   135    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (21 MARCH - 23 MARCH)
Date   T index  Conditions       MUFs                              
21 Mar   130    Normal           Near predicted values to 15% 
                                 enhanced
22 Mar   125    Normal           Near predicted monthly values 
                                 to 15% enhanced    
23 Mar   110    Normal-fair      Near predicted monthly values 
                                 to 15% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 20-Mar were near predicted values to 15% enhanced. 
Some minor spread-F was observed in Hobart. Scintillation was 
observed in Darwin and Weipa from 1115 UT to 1310 UT with a maximum 
S4 index of 1.0. MUFs are expected to be near predicted values 
to 15% enhanced over 21-22 Mar; MUFs may become depressed by 
15% by 23-Mar. Equatorial scintillation is likely.

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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