[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 November 23 issued 2331 UT on 19 Nov 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 NOVEMBER) 
Date   T index  Conditions    
19 Nov   114    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0 18/2234UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Depressed by 30% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly 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      130
Nov      100
Dec      98


2. FORECAST (20 NOVEMBER - 22 NOVEMBER)
Date   T index  Conditions       MUFs                              
20 Nov    95    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed
21 Nov    95    Normal-fair      Near predicted monthly values 
                                 to 10-15% depressed    
22 Nov   100    Normal           Near predicted monthly values 
                                 to 10-15% depressed   

COMMENT: ASWFC SWF HF Communications Warning 114 was issued on 
18 November and is current for 19-20 Nov. Maximum usable frequencies 
(MUFs) in the Australian region were mostly near predicted monthly 
values. Sporadic-E was observed in Canberra and Hobart during 
local night hours. MUFs are expected to become 10-20% degraded 
on 20-Nov due to anticipated geomagnetic activity. MUFs depressions 
of 10-15% may continue over 21-22 Nov, but are likely to recover 
by the end of the period. Isolated shortwave fadeouts are possible.

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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