[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 April 25 issued 2331 UT on 13 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 APRIL) 
Date   T index  Conditions    
13 Apr   112    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    0405UT  possible   lower  E. Asia/Aust.
  M2.3    0452UT  possible   lower  E. Asia/Aust.
  M1.0    0652UT  possible   lower  Mid East/Indian
  M1.4    0955UT  possible   lower  Mid East/Indian
  M1.2    1542UT  possible   lower  South American/
                                    Atlantic
  M3.2    1851UT  possible   lower  East Pacific/
                                    North American
  M1.6    2202UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 25% during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

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


2. FORECAST (14 APRIL - 16 APRIL)
Date   T index  Conditions       MUFs                              
14 Apr   120    Normal           Near predicted monthly values
15 Apr   100    Fair             Near predicted monthly values/depressed 
                                 5 to 15%    
16 Apr   100    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 13-Apr were near predicted values to 15% enhanced 
in the northern Australian region. Depressed conditions of up 
to 25% were observed in the southern Australian region. Spread-F 
was observed in Hobart. MUFs are expected to be near predicted 
monthly values on 14-Apr. Near predicted monthly values to 15% 
depressed conditions are expected over 15-16 Apr.

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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