[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 March 26 issued 2332 UT on 30 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 MARCH) 
Date   T index  Conditions    
30 Mar   111    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  X1.5    0319UT  probable   all    E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 35% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

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


2. FORECAST (31 MARCH - 02 APRIL)
Date   T index  Conditions       MUFs                              
31 Mar    90    Normal-fair      Near predicted monthly values
01 Apr    80    Poor-fair        Near predicted monthly values    
02 Apr    80    Fair             Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 30-Mar were generally near predicted values 
with enhancements of up to 25% after local dawn in the Southern 
Australian region. Enhancements of up to 20% were also seen in 
the Northern Australian region during local night. Spread F was 
observed at Hobart and Perth during the local night. MUFs are 
expected to be near predicted monthly values over 31-Mar to 02-Apr. 
While ionospheric depression is anticipated due to a CME expected 
to arrive on the 31-Mar, the ionosphere is currently enhanced 
beyond predicted monthly values. As such, this activity will 
bring MUFs to near predicted monthly values. Degraded HF conditions 
are likely to be experienced during local night hours over the 
next three days.

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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