[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 January 24 issued 2343 UT on 23 Jan 2024 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 JANUARY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 JANUARY) 
Date   T index  Conditions    
23 Jan   144    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M2.1 22/2222UT  possible   lower  East Pacific/
                                    North American
  M5.1    0331UT  possible   lower  E. Asia/Aust.
  M2.4    0811UT  possible   lower  Mid East/Indian
  M1.0    1258UT  possible   lower  European
  M1.3    1459UT  possible   lower  South American/
                                    Atlantic
  M4.3    1640UT  possible   lower  South American/
                                    Atlantic
  M1.0    1829UT  possible   lower  East Pacific/
                                    North American
  M1.0    1952UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 30% during local night.
      Enhanced by 25% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Dec      110
Jan      106
Feb      105


2. FORECAST (24 JANUARY - 26 JANUARY)
Date   T index  Conditions       MUFs                              
24 Jan   130    Normal           Near predicted monthly values 
                                 to 20% enhanced
25 Jan   100    Normal-fair      Near predicted monthly values 
                                 to 20% depressed    
26 Jan   100    Fair             Near predicted monthly values 
                                 to 20% depressed   

COMMENT: ASWFC SWF HF Communications Warning 8 was issued on 
22 January and is current for 23-25 Jan. ASWFC Preliminary HF 
Communications Warning 9 was issued on 23 January and is current 
for 25-27 Jan. Maximum usable frequencies (MUFs) on UT day 23-Jan 
were near predicted values to 30% enhanced in the Australian 
region. Sporadic-E was observed at Townsville, Learmonth and 
Hobart during local night hours. Some spread-F was observed at 
Hobart during local night hours. Equatorial scintillation was 
observed near Weipa between 2300-2330 UT on 22-Jan. 

MUFs are expected to be near predicted monthly values to 20% enhanced 
on 24-Jan. MUFs may become depressed by 20% over 25-26 Jan due 
to anticipated geomagnetic activity. Shortwave fadeouts are probable.

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