[Ips-dhfpr] ASWFC Daily HF Prop Report - 01 January 25 issued 2330 UT on 01 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 JANUARY) 
Date   T index  Conditions    
01 Jan    69    Fair-poor      

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    0445UT  possible   lower  E. Asia/Aust.
  M1.0    1524UT  possible   lower  South American/
                                    Atlantic
  M1.2    1817UT  possible   lower  East Pacific/
                                    North American
  M1.1    2141UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Depressed by 30% during local day.
      Depressed by 15% during local night.
      Enhanced by 25% after local dawn.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 45% after local dawn.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% 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
Dec      132
Jan      119
Feb      116


2. FORECAST (02 JANUARY - 04 JANUARY)
Date   T index  Conditions       MUFs                              
02 Jan    80    Fair             Near predicted monthly values 
                                 to 30% depressed
03 Jan    95    Normal-fair      Near predicted values to 25% 
                                 depressed    
04 Jan   105    Normal-fair      Near predicted monthly values 
                                 to 10% depressed   

COMMENT: ASWFC HF Communications Warning 1 was issued on 1 January 
and is current for 1-2 Jan. Maximum usable frequencies (MUFs) 
in the Australian region were depressed up to 45%, particularly 
during local night hours. Conditions during local night hours 
in the Australian region were significantly degraded, especially 
in Hobart, Perth and Canberra, Spread-F was common at most sites. 
Scintillation was observed at Weipa from 1039-1440 UT. Degraded 
and depressed conditions are expected to continue on 02-Jan, 
with depressions lingering over 03-04 Jan.

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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