[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 January 24 issued 2330 UT on 24 Jan 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 JANUARY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 JANUARY) 
Date   T index  Conditions    
24 Jan   145    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0038UT  possible   lower  West Pacific
  M2.6    0141UT  possible   lower  West Pacific
  M1.4    0544UT  possible   lower  E. Asia/Aust.
  M1.3    2058UT  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:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      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
Dec      110
Jan      106
Feb      105


2. FORECAST (25 JANUARY - 27 JANUARY)
Date   T index  Conditions       MUFs                              
25 Jan   140    Fair             Near predicted monthly values
26 Jan   120    Normal-fair      Near predicted monthly values    
27 Jan   120    Normal           Near predicted monthly values   

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 24-Jan 
were near predicted monthly values in the Australian region, 
with enhancements of up to 15% observed in the northern Australian 
region. Sporadic-E was observed at Hobart and Canberra. Some 
spread-F was observed at Hobart during local night hours. MUFs 
are expected to be near predicted monthly values to 15% enhanced 
on 25-Jan. MUFs may become depressed by up to 15% over 26-27 
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