[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 March 26 issued 2330 UT on 17 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 MARCH) 
Date   T index  Conditions    
17 Mar    85    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    0904UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   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
Feb      98
Mar      87
Apr      85


2. FORECAST (18 MARCH - 20 MARCH)
Date   T index  Conditions       MUFs                              
18 Mar    90    Normal           Near predicted monthly values
19 Mar    90    Normal-fair      Near predicted monthly values 
                                 to 15% depressed    
20 Mar    80    Normal-fair      Near predicted monthly values 
                                 to 20% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 17-Mar were near predicted values to 20% enhanced. 
Some spread-F was observed in Hobart during local night hours. 
Scintillation was observed in Darwin from 1151 to 1526UT. MUFs 
are expected to be mostly normal over 18-19 Mar, however due 
to an anticipated geomagnetic disturbance late on 19-Mar conditions 
may became mildly depressed upon commencement. MUFs may be depressed 
up to 20% on 20-Mar.

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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