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

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (24 DECEMBER) 
Date   T index  Conditions    
24 Dec   132    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M4.8    0019UT  possible   lower  West Pacific
  M1.0    0211UT  possible   lower  E. Asia/Aust.
  M4.1    0841UT  possible   lower  Mid East/Indian
  M1.1    1410UT  possible   lower  South American/
                                    Atlantic
  M1.3    1634UT  possible   lower  South American/
                                    Atlantic
  M1.1    1824UT  possible   lower  East Pacific/
                                    North American
  M1.0    2029UT  possible   lower  East Pacific/
                                    North American
  M1.2    2234UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   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
Nov      127
Dec      117
Jan      114


2. FORECAST (25 DECEMBER - 27 DECEMBER)
Date   T index  Conditions       MUFs                              
25 Dec   115    Normal           Near predicted monthly values
26 Dec   105    Normal-fair      Near predicted monthly values 
                                 to 10-15% depressed    
27 Dec   110    Normal-fair      Near predicted monthly values 
                                 to 10-15% depressed   

COMMENT: ASWFC SWF HF Communications Warning 148 was issued on 
23 December and is current for 24-26 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 24-Dec were near predicted 
values. Sporadic-E was observed in most sites during local night 
hours. MUFs are expected to be near predicted values for most 
of 25-Dec. Depressions of 10-15% may commence from early 26-Dec 
due to anticipated geomagnetic activity. Depressions may continue 
into 27-Dec.

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