[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 May 26 issued 2330 UT on 19 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 MAY) 
Date   T index  Conditions    
19 May    50    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Depressed by 25% during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   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 (20 MAY - 22 MAY)
Date   T index  Conditions       MUFs                              
20 May    55    Normal           Near predicted monthly values
21 May    65    Normal           Near predicted monthly values    
22 May    65    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) on UT day 19-May were 
near predicted monthly values in the northern Australian region. 
MUFs were depressed by 15-20% in southern Australia over the 
UT day. Spread-F was observed at Hobart, Perth and Canberra during 
local night hours. MUFs are expected to be near predicted monthly 
values over 20-22 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