[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 March 26 issued 2330 UT on 22 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 MARCH) 
Date   T index  Conditions    
22 Mar    84    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      No data available during local day.
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 35% over the UT day.

PCA Event : No event.

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


2. FORECAST (23 MARCH - 25 MARCH)
Date   T index  Conditions       MUFs                              
23 Mar    80    Fair             Depressed by 10-20%
24 Mar    80    Normal-fair      Depressed by 10-20%    
25 Mar    90    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed   

COMMENT: ASWFC HF Communications Warning 28 was issued on 21 
March and is current for 22-24 Mar. Maximum usable frequencies 
in the Australian region on UT day 22-Mar were enhanced in the 
northern regions and depressed by 20% in the southern regions. 
Sporadic-E was observed during local night-dawn hours along the 
eastern coast of Australia. HF radio conditions in Darwin were 
degraded during local night-dawn hours. Ionospheric scintillation 
was observed in Weipa from 1121 to 1140 UT. MUFs are expected 
to remain depressed up to 20% due to ongoing geomagnetic activity 
over 23-24 Mar, beginning to recover by 25-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