[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 May 23 issued 2330 UT on 13 May 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 MAY) 
Date   T index  Conditions    
13 May   108    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Mostly 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
Apr      120
May      87
Jun      88


2. FORECAST (14 MAY - 16 MAY)
Date   T index  Conditions       MUFs                              
14 May   100    Normal           Near predicted monthly values
15 May   100    Normal           Near predicted monthly values    
16 May   100    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 13-May were 
mostly near predicted monthly values in the Australian region. 
Spread-F was observed at Hobart, Norfolk, Townsville and Darwin 
during local night hours. Sporadic E was observed across the 
Australian region during 13-May. MUFs are expected to be near 
predicted monthly values to 15% enhanced over 14-16 May. Isolated 
shortwave fadeouts are possible over 14-16 May.

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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