[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 December 22 issued 2331 UT on 08 Dec 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 DECEMBER) 
Date   T index  Conditions    
08 Dec    73    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   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 (09 DECEMBER - 11 DECEMBER)
Date   T index  Conditions       MUFs                              
09 Dec    70    Normal           Near predicted monthly values
10 Dec    70    Normal           Near predicted monthly values    
11 Dec    70    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 97 was issued 
on 6 December and is current for 7-9 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 8-Dec were near predicted 
monthly values with some mild depressions observed in the eastern 
Australian region during local day. Spread F was observed at 
Hobart during local night hours. Significant sporadic E was observed 
across the Australian region, mostly impacting lower frequencies 
during local night. MUFs are expected to be generally near predicted 
monthly values over 9-11 Dec with mild depressions possible over 
9-10 Dec for the southern Australian region due to ongoing coronal 
hole high speed wind stream effects. Sporadic E can also be expected 
across the Australian region during local night hours. Shortwave 
fadeouts are possible.

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