[Ips-dhfpr] ASWFC Daily HF Prop Report - 31 May 26 issued 2330 UT on 31 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/31 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (31 MAY) 
Date   T index  Conditions    
31 May    90    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      74
May      71
Jun      68


2. FORECAST (01 JUNE - 03 JUNE)
Date   T index  Conditions       MUFs                              
01 Jun    90    Normal           Near predicted monthly values
02 Jun    90    Normal           Near predicted monthly values    
03 Jun    90    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
and Antarctic regions were near predicted monthly values over 
UT day 31-May, with some enhancements seen in the northern Australian 
region. Significant mixed spread-F was observed across the Australian 
region during local night hours, with the most significant spread-F 
observed in the southern Australian region. MUFs are expected 
to remain near predicted values over 01-03 Jun, with some enhancements 
of up to 15% 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