[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 November 24 issued 0011 UT on 19 Nov 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 NOVEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
Reissue due to missing M2 flare from flare list.
1. SUMMARY (18 NOVEMBER) 
Date   T index  Conditions    
18 Nov   142    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0522UT  possible   lower  E. Asia/Aust.
  M1.7    0732UT  possible   lower  Mid East/Indian
  M1.2    0757UT  possible   lower  Mid East/Indian
  M2.5    1058UT  possible   lower  European
  M1.6    1112UT  possible   lower  European
  M3.7    1253UT  possible   lower  European
  M1.8    1749UT  possible   lower  South American/
                                    Atlantic
  M1.8    1904UT  possible   lower  East Pacific/
                                    North American
  M2.0    1915UT  possible   lower  East Pacific/
                                    North American
  M1.1    2051UT  possible   lower  East Pacific/
                                    North American
  

MUFs:
   Cocos Island Region:
      Enhanced by 20-25%.
   Niue Island Region:
      Enhanced by 20-30%.
   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
Oct      139
Nov      119
Dec      117


2. FORECAST (19 NOVEMBER - 21 NOVEMBER)
Date   T index  Conditions       MUFs                              
19 Nov   135    Normal           Near to 15% above predicted 
                                 monthly values
20 Nov   135    Normal           Near to 15% above predicted 
                                 monthly values    
21 Nov   135    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 135 was issued on 
17 November and is current for 18-20 Nov. Maximum usable frequencies 
(MUFs) on UT day 18-Nov in the Australian region were near predicted 
monthly values. Southern Australian region sites were mildly 
depressed by 15% at times. Spread F was observed at Hobart during 
local night hours. Sporadic E was observed at southern region 
sites during local night hours. A brief minor fadeout was observed 
18/0520-0524UT. MUFs are generally expected to be near predicted 
monthly values to 15% enhanced over 19-21 Nov, with MUFs in the 
southern Australian region depressed by up to 15% at times on 
19-Nov. Minor shortwave fadeouts are likely.

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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