[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 April 25 issued 2330 UT on 10 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/10 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (10 APRIL) 
Date   T index  Conditions    
10 Apr   136    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 20-30%.
   Niue Island Region:
      Enhanced by 25-30%. 
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Hobart depressed 20-30% early in UT day.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      126
Apr      115
May      113


2. FORECAST (11 APRIL - 13 APRIL)
Date   T index  Conditions       MUFs                              
11 Apr   140    Normal-fair      Near predicted monthly values 
                                 to 15% enhanced
12 Apr   140    Normal           Near predicted monthly values 
                                 to 15% enhanced    
13 Apr   140    Normal           Near predicted monthly values 
                                 to 15% enhanced   

COMMENT: ASWFC SWF HF Communications Warning 36 was issued on 
10 April and is current for 11-13 Apr. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 10-Apr were generally 
near predicted values to 20% enhanced. MUFs at Hobart were depressed 
20-30% during the period 10/0000-0300UT then recovered. Spread-F 
was observed at Hobart and Perth during local night hours. MUFs 
are expected to be near predicted values to 15% enhanced over 
11-13 Apr. Isolated 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