[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 October 22 issued 2331 UT on 23 Oct 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 OCTOBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 OCTOBER) 
Date   T index  Conditions    
23 Oct    20    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 25-35%.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Depressed by 25-35%.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      74
Oct      69
Nov      69


2. FORECAST (24 OCTOBER - 26 OCTOBER)
Date   T index  Conditions       MUFs                              
24 Oct    45    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
25 Oct    55    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values    
26 Oct    60    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 23-Oct were 
depressed by 25-35% in southern Australian region following recent 
mild geomagnetic activity. Northern Australian region MUFs were 
generally near predicted monthly values. The depressed conditions 
at Cocos Island are probably due to equatorial ionospheric anomaly 
variation rather than the recent mild geomagnetic activity which 
impacted the regional middle latitude ionosphere. Spread F was 
observed overnight at Hobart, Canberra and Perth. MUFs are expected 
to be 15% depressed to near normal today with further degraded 
HF conditions for the southern Australian region possible 
over 24-25-Oct, particularly during local night hours.

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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