[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 March 23 issued 2331 UT on 04 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 MARCH) 
Date   T index  Conditions    
04 Mar   110    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0710UT  possible   lower  Mid East/Indian
  M1.2    1342UT  possible   lower  European
  M5.2    1557UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 20-35% during local day.
   Niue Island Region:
      Enhanced by 30-35% during local day.
   Northern Australian Region:
      Enhanced by 15-30% during local day.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (05 MARCH - 07 MARCH)
Date   T index  Conditions       MUFs                              
05 Mar   110    Normal-fair      Near predicted monthly values
06 Mar    90    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values    
07 Mar    90    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 26 was issued on 
4 March and is current for 4-6 Mar. Maximum usable frequencies 
(MUFs) on UT day 04-Mar were 20-35% enhanced in the northern 
Australian region, with strongly enhanced MUFs observed at Darwin 
and Niue. Southern Australian region MUFs were depressed 15-20% 
during the local day. Mild spread-F was observed at Perth and 
Hobart during local night hours. MUFs are generally expected 
to be near predicted monthly values to 10-15% enhanced for 05 
Mar, with brief 15% depressions for the southern Australian region 
observed after local dawn this morning. MUFs may again become 
15% depressed in the southern Australian region on 06-Mar due 
to anticipated mild geomagnetic activity from a coronal hole 
wind stream.

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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