[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 February 25 issued 2330 UT on 04 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 FEBRUARY) 
Date   T index  Conditions    
04 Feb   141    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.4 03/2328UT  possible   lower  West Pacific
  M1.2    0050UT  possible   lower  West Pacific
  M2.6    0148UT  possible   lower  West Pacific
  M1.2    0518UT  possible   lower  E. Asia/Aust.
  M4.7    1121UT  possible   lower  European
  M3.2    1313UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
   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 (05 FEBRUARY - 07 FEBRUARY)
Date   T index  Conditions       MUFs                              
05 Feb   125    Normal           Near predicted monthly values
06 Feb   125    Normal           Near predicted monthly values    
07 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 near predicted monthly values 
to 25% enhanced on UT day 04-Feb. Shortwave fadeouts impacting 
lower HF frequencies were observed 04/0142-0211UT and 04/0514-0523UT. 
Equatorial ionospheric scintillation was observed at Darwin during 
the interval 04/1547-1606UT. MUFs are expected to be near predicted 
monthly values over 05-07 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