[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 March 26 issued 2330 UT on 23 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 MARCH) 
Date   T index  Conditions    
23 Mar    38    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 30-35%.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      98
Mar      87
Apr      85


2. FORECAST (24 MARCH - 26 MARCH)
Date   T index  Conditions       MUFs                              
24 Mar    55    Fair             Depressed by 15-20% southern 
                                 Australian region
25 Mar    70    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values    
26 Mar    90    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 28 was issued on 21 
March and is current for 22-24 Mar. Maximum usable frequencies 
in the southern Australian region on UT day 23-Mar were depressed 
30-35%. In the northern Australian region MUFs were 20% enhanced 
during the local day and 20% depressed during the local night. 
Spread F was observed during the local night hours at Hobart, 
Canberra, Brisbane and Perth. Southern Australian region MUFs 
are 20% depressed after local dawn this morning. Northern Australian 
region MUFs are currently near predicted monthly values. Southern 
Australian region MUFs are expected to be 15-20% depressed during 
the local day on 24-Mar. Australian region MUFs are then expected 
to gradually recover by 25-26 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