[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 August 26 issued 2330 UT on 11 Aug 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 AUGUST 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 AUGUST) 
Date   T index  Conditions    
11 Aug    41    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 20% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values 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
Jul      75
Aug      64
Sep      61


2. FORECAST (12 AUGUST - 14 AUGUST)
Date   T index  Conditions       MUFs                              
12 Aug    35    Normal           Depressed 15%/near predicted 
                                 monthly values
13 Aug    45    Normal           Near predicted monthly values    
14 Aug    45    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 72 was issued on 11 
August and is current for 12 Aug only. Maximum Usable Frequencies 
(MUFs) in the Australian region on UT day 11-Aug were near predicted 
monthly values to 15% depressed. Spread F was observed at several 
Australian sites during local night hours. MUFs are forecast 
to be near predicted monthly values to 15% depressed on 12-Aug, 
then near predicted monthly values over 13-14 Aug.

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