[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 September 22 issued 2330 UT on 11 Sep 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 SEPTEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 SEPTEMBER) 
Date   T index  Conditions    
11 Sep    72    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 45% during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   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
Aug      53
Sep      68
Oct      69


2. FORECAST (12 SEPTEMBER - 14 SEPTEMBER)
Date   T index  Conditions       MUFs                              
12 Sep    65    Normal           Near predicted monthly values
13 Sep    65    Normal           Near predicted monthly values    
14 Sep    60    Normal-fair      Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 11-Sep were 
mostly near predicted monthly values for the Australian region, 
with enhanced conditions observed at Darwin during local day 
and brief periods of depression observed in the Southern Australian 
region during local night. Spread-F was observed at Hobart and 
sporadic E was observed at Darwin and Cocos Islands, all during 
local night. Regional MUFs are expected to be near predicted 
monthly values over 12-13 Sep, with mild depressions possible 
at high latitudes during local night. Mildly depressed conditions 
are possible on 14-Sep due to a combination of high speed wind 
stream effects from an equatorial coronal hole moving towards 
a geoeffective position and a possible glancing blow from a CME 
first observed on 09-Sep.

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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