[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 July 26 issued 2330 UT on 04 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 JULY) 
Date   T index  Conditions    
04 Jul   108    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    0000UT  possible   lower  West Pacific
  M2.1    0113UT  possible   lower  West Pacific
  M3.7    0332UT  possible   lower  E. Asia/Aust.
  M1.4    0515UT  possible   lower  E. Asia/Aust.
  M1.8    0807UT  possible   lower  Mid East/Indian
  M1.0    0852UT  possible   lower  Mid East/Indian
  M3.2    1112UT  possible   lower  European
  M3.2    1351UT  possible   lower  European
  M1.1    1606UT  possible   lower  South American/
                                    Atlantic
  M1.9    1848UT  possible   lower  East Pacific/
                                    North American
  M1.5    1936UT  possible   lower  East Pacific/
                                    North American
  X1.3    2041UT  probable   all    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 25% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values 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
Jun      81
Jul      66
Aug      63


2. FORECAST (05 JULY - 07 JULY)
Date   T index  Conditions       MUFs                              
05 Jul    75    Normal-fair      Depressed 10 to 20%/near predicted 
                                 monthly values
06 Jul    80    Normal           Depressed 10 to 20%/near predicted 
                                 monthly values    
07 Jul    85    Normal-fair      Near predicted monthly values 
                                 to 10% depressed   

COMMENT: Maximum usable frequencies (MUFs) on UT day 4-Jul were 
variable in the Australian region. MUFs were mostly near predicted 
values to enhanced during local day and night hours, but some 
depressions were present during local dawn hours. Sporadic-E 
was observed in Niue Island; spread-F was observed in Darwin 
and overall degraded conditions were observed in Hobart during 
local night hours. Further degraded conditions are expected in 
the Australian region for HF propagation on 5-Jul. MUFs are expected 
to become depressed by 20% over 5-6 Jul, possibly recovering 
by 7-Jul.

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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