[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 March 23 issued 2333 UT on 17 Mar 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 MARCH) 
Date   T index  Conditions    
17 Mar   137    Normal         

Flares  Max     Fadeout   Freq.  Sectors
M1.0    1507UT  Possible  lower  South American/Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 55% during local night.
      Enhanced by 55% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 70% during local night.
   Northern Australian Region:
      Enhanced by 15-30%.
   Southern Australian Region:
      Enhanced by 25-35%.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      117
Mar      80
Apr      80


2. FORECAST (18 MARCH - 20 MARCH)
Date   T index  Conditions       MUFs                              
18 Mar   140    Normal           15 to 30% above predicted monthly 
                                 values
19 Mar   140    Normal-poor      15 to 30% above predicted monthly 
                                 values    
20 Mar    80    Poor-normal      Depressed 20%/15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 17-Mar in 
the Australian region were enhanced by 15-70%. Scintillation 
was observed at Niue from 17/1042-1059UT. MUFs are expected to 
be enhanced by 15-30% over 18-Mar. Southern Australian region 
MUFs are expected to become depressed on 20-Mar if geomagnetic 
activity induced from a recent erupting solar filament eventuates. 
Northern Australian region MUFs are expected to remain enhanced. 
Isolated minor fadeouts possible.

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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