[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 June 26 issued 2330 UT on 21 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 JUNE) 
Date   T index  Conditions    
21 Jun    72    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.6    0246UT  possible   lower  E. Asia/Aust.
  M6.9    1929UT  probable   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly 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
May      67
Jun      68
Jul      65


2. FORECAST (22 JUNE - 24 JUNE)
Date   T index  Conditions       MUFs                              
22 Jun    75    Normal           Near predicted monthly values
23 Jun    75    Normal           Near predicted monthly values    
24 Jun    68    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 55 was issued on 
21 June and is current for 21-23 Jun. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 21-Jun were mostly 
near predicted values. Spread-F was observed in Brisbane during 
local night hours. MUFs are expected to be mostly near predicted 
monthly values over 22-24 Jun. Some spread-F may be present during 
local night and dawn hours on 24-Jun.

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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