[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 March 25 issued 2330 UT on 15 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 MARCH) 
Date   T index  Conditions    
15 Mar   142    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1 14/2221UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

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


2. FORECAST (16 MARCH - 18 MARCH)
Date   T index  Conditions       MUFs                              
16 Mar   130    Normal           Near predicted monthly values 
                                 to 20-30% enhanced
17 Mar   120    Normal-fair      Near predicted monthly values 
                                 to 15-20% enhanced    
18 Mar   115    Normal           Near predicted monthly values 
                                 to 10-15% enhanced   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 15-Mar were near predicted values to 35% enhanced. 
Conditions in Darwin ionograms appeared heavily degraded, however 
this may have been an artificial issue. Spread-F was observed 
in Hobart. Scintillation was observed at Darwin and Weipa from 
1027 to 1332 UT. MUFs are expected to be near predicted values 
over 16-18 Mar; some 20-30% enhancements may continue on 16-Mar 
but may lessen over the rest of the forecast period.

----------------------------------------------------------
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