[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 April 25 issued 2331 UT on 11 Apr 2025 [SEC=OFFICIAL]

Australian Space Weather Forecasting Centre aswfc at bom.gov.au
Sat Apr 12 09:31:19 AEST 2025


SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 APRIL) 
Date   T index  Conditions    
11 Apr   132    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    1650UT  possible   lower  South American/
                                    Atlantic
  M1.0    2220UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 40% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      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
Mar      126
Apr      115
May      113


2. FORECAST (12 APRIL - 14 APRIL)
Date   T index  Conditions       MUFs                              
12 Apr   135    Normal           Near predicted monthly values 
                                 to 15% enhanced
13 Apr   140    Normal           Near predicted monthly values 
                                 to 15% enhanced    
14 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) on UT day 11-Apr were near predicted values in the Australian 
region. Spread F was observed in Hobart during local dawn hours. 
MUFs are expected to be near predicted values to 15% enhanced 
over 12-14 Apr.

----------------------------------------------------------
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



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