[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 March 25 issued 2330 UT on 27 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 MARCH) 
Date   T index  Conditions    
27 Mar   120    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    0037UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Enhanced by 35% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 50% during local night.
   Northern Australian Region:
      Depressed 15% to near predicted monthly values.
      Enhanced 15% after local dawn.
   Southern Australian Region:
      Depressed 15% to near predicted monthly values.
      Depressed 15% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 40% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      127
Mar      117
Apr      114


2. FORECAST (28 MARCH - 30 MARCH)
Date   T index  Conditions       MUFs                              
28 Mar   100    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
29 Mar   125    Normal           Near predicted monthly values    
30 Mar   125    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 27-Mar were depressed 15% to near predicted 
values. Spread-F was observed at Perth, Hobart and Canberra during 
local night hours. MUFs are expected to be 15% depressed to near 
predicted monthly values on 28-Mar and near predicted monthly 
values during 29-30 Mar, with a general improvement in HF conditions. 
Mildly degraded HF conditions may be experienced during local 
night hours on 28-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