[Ips-dhfpr] ASWFC Daily HF Prop Report - 29 March 23 issued 2330 UT on 29 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/29 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (29 MARCH) 
Date   T index  Conditions    
29 Mar   137    Normal         

Flares    Max     Fadeout    Freq.  Sectors
 X1/--    0233UT  probable   all    E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 80% during local night.
      Enhanced by 40% after local dawn.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 40% during local night.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 25% during local night.
      Enhanced by 40% after local dawn.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
      Enhanced by 30% after local dawn.
   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 (30 MARCH - 01 APRIL)
Date   T index  Conditions       MUFs                              
30 Mar   135    Normal           Near to 20% above predicted 
                                 monthly values
31 Mar   120    Normal-fair      Near to 20% above predicted 
                                 monthly values    
01 Apr   115    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 33 was issued on 
29 March and is current for 29-30 Mar. Maximum usable frequencies 
(MUFs) on UT day 29-Mar in the Australian region were enhanced 
by up 25-40%. Strong enhancements were observed at Cocos Islands. 
Scintillation was observed at Weipa from 29/1037-1052UT. MUFs 
are expected to be near predicted monthly values to 20% enhanced 
over 30-31 Mar, then trending to near predicted values on 01-Apr 
due to anticipated geomagnetic activity from a small coronal 
hole wind stream. Mildly degraded conditions may be observed 
over 31-Mar and 01-Apr.

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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