[Ips-dhfpr] ASWFC Daily HF Prop Report - 03 February 25 issued 2331 UT on 03 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/03 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 FEBRUARY) 
Date   T index  Conditions    
03 Feb   110    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0347UT  possible   lower  E. Asia/Aust.
  M8.8    0358UT  probable   lower  E. Asia/Aust.
  M1.0    0432UT  possible   lower  E. Asia/Aust.
  M3.1    0547UT  possible   lower  E. Asia/Aust.
  M2.5    0744UT  possible   lower  Mid East/Indian
  M1.4    0913UT  possible   lower  Mid East/Indian
  M6.1    1318UT  probable   lower  European
  M4.3    1836UT  possible   lower  East Pacific/
                                    North American
  M1.4    2112UT  possible   lower  East Pacific/
                                    North American

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 30% during local night.
   Northern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jan      124
Feb      118
Mar      115


2. FORECAST (04 FEBRUARY - 06 FEBRUARY)
Date   T index  Conditions       MUFs                              
04 Feb   125    Normal           Near predicted monthly values
05 Feb   125    Normal           Near predicted monthly values    
06 Feb   125    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 17 was issued on 
3 February and is current for 3-5 Feb. Maximum usable frequencies 
(MUFs) in the Australian region were 20-25% depressed on UT day 
03-Feb. Mild spread-F was observed at Hobart during local night 
hours. Shortwave fadeouts impacting lower HF frequencies were 
observed 02/2314-2356UT, 03/0343-0421UT, 03/0429-0436UT and 03/0542-0557UT. 
MUFs are expected to be near predicted monthly values over 04-06 
Feb. Frequent shortwave fadeouts are probable.

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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