[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 March 25 issued 2331 UT on 16 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 MARCH) 
Date   T index  Conditions    
16 Mar   141    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 40% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (17 MARCH - 19 MARCH)
Date   T index  Conditions       MUFs                              
17 Mar   130    Normal           Near predicted monthly values 
                                 to 20% enhanced
18 Mar   120    Normal           Near predicted monthly values 
                                 to 20% enhanced    
19 Mar   115    Normal           Near predicted monthly values 
                                 to 20% enhanced   

COMMENT: Maximum usable frequencies (MUFs) on UT day 16-Mar were 
mostly near predicted values to 15% enhanced. Sporadic-E was 
observed in Brisbane during local night and dawn hours. Scintillation 
was observed from 1204 to 1320 UT in Darwin and Weipa with a 
maximum S4 of 1.0. MUFs are expected to be near predicted monthly 
values over 17-19 Mar. Due to the large number of sunspots currently 
on the disk, MUFs are likely to be enhanced up to 20% over this 
period, however due to the recent coronal hole there may also 
be pockets of brief 10-15% depressions on 17-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