[Ips-dhfpr] ASWFC Daily HF Prop Report - 01 December 22 issued 2332 UT on 01 Dec 2022 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 DECEMBER) 
Date   T index  Conditions    
01 Dec    50    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    0721UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 20%-50%.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Nov      77
Dec      70
Jan      70


2. FORECAST (02 DECEMBER - 04 DECEMBER)
Date   T index  Conditions       MUFs                              
02 Dec    50    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
03 Dec    60    Normal           Depressed 5 to 10%/near predicted 
                                 monthly values    
04 Dec    65    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 93 was issued on 30 
November and is current for 1-3 Dec. ASWFC SWF HF Communications 
Warning 94 was issued on 1 December and is current for 1-2 Dec. 
Maximum usable frequencies (MUFs) on UT day 01-Dec were depressed 
15-20% to near predicted monthly values. Strong MUF enhancements 
were observed at Niue. Strong spread F was observed at Hobart 
during local night hours. Isolated periods of strong sporadic 
E were observed at some sites during the local day. MUFs are 
generally expected to be mildly depressed to near monthly predicted 
values for 02-03 Dec with an improving trend. Further degraded 
HF conditions may be experienced during local night hours over 
02-03 Dec for the southern Australian region as the recent mildly 
enhanced geomagnetic conditions induced by a coronal hole wind 
stream declines. Frequencies of ionospheric support are expected 
to return to near normal from 04-Dec.

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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