[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 May 23 issued 2330 UT on 04 May 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 MAY) 
Date   T index  Conditions    
04 May    98    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M3.9    0844UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 60% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      120
May      84
Jun      85


2. FORECAST (05 MAY - 07 MAY)
Date   T index  Conditions       MUFs                              
05 May    93    Normal           Near predicted monthly values
06 May    95    Normal-fair      Near predicted monthly values    
07 May    95    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 42 was issued on 
3 May and is current for 3-5 May. Maximum usable frequencies 
(MUFs) on UT day 4-May in the Australian region were near predicted 
monthly values, with enhancements of up to 15% observed in the 
Southern Australian region. Spread F was observed at Hobart and 
Perth during local night hours. MUFs are expected to be near 
predicted monthly values over 5-7 May, with a chance of mild 
depressions on 7-May due to possible geomagnetic activity on 
6-May. Shortwave fadeouts are possible.

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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