[Ips-dhfpr] ASWFC Daily HF Prop Report - 20 June 26 issued 2330 UT on 20 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 JUNE) 
Date   T index  Conditions    
20 Jun    76    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    0151UT  possible   lower  West Pacific
  M1.0    1500UT  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 during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      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 (21 JUNE - 23 JUNE)
Date   T index  Conditions       MUFs                              
21 Jun    75    Normal           Near predicted monthly values
22 Jun    75    Normal           Near predicted monthly values    
23 Jun    75    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 54 was issued on 
20 June and is current for 20-21 Jun. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 20-Jun were mostly 
near predicted values. Spread-F was observed in Norfolk Island 
and in Hobart during local night hours. MUFs are expected to 
be mostly near predicted monthly values over 21-23 Jun.

----------------------------------------------------------
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