[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 May 26 issued 2330 UT on 16 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 MAY) 
Date   T index  Conditions    
16 May    64    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.9    1612UT  possible   lower  South American/
                                    Atlantic
  M1.9    1742UT  possible   lower  South American/
                                    Atlantic

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:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

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


2. FORECAST (17 MAY - 19 MAY)
Date   T index  Conditions       MUFs                              
17 May    60    Normal           Near predicted monthly values
18 May    55    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%    
19 May    55    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%   

COMMENT: Maximum Usable Frequencies (MUFs) were near predicted 
monthly values in the northern Australian region, with depressions 
of up to 25% observed in the southern Australian region. Significant 
spread-F and sporadic E were observed at Hobart during local 
night hours. MUFs are expected to be near predicted monthly values 
over 17-18 May, with depressions of up to 15% expected possible 
from late on 18-May through 19-May due to anticipated geomagnetic 
activity,

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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