[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 March 23 issued 2331 UT on 21 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 MARCH) 
Date   T index  Conditions    
21 Mar   136    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 40% during local day.
      Enhanced by 65% during local night.
      Enhanced by 25% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 30% during local night.
      Enhanced by 35% after local dawn.
   Southern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 25% during local night.
      Enhanced by 35% 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 (22 MARCH - 24 MARCH)
Date   T index  Conditions       MUFs                              
22 Mar   140    Normal           20 to 30% above predicted monthly 
                                 values
23 Mar   115    Normal           20% enhanced to near predicated 
                                 monthly values    
24 Mar   115    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 31 was issued on 
20 March and is current for 20-22 Mar. Maximum usable frequencies 
(MUFs) on UT day 21-Mar in the Australian region were enhanced 
by 20-35%. MUFs are expected to be enhanced by 20-30% on 22-Mar, 
and tending towards monthly predicted values over 23-24 Mar due 
to possible anticipated geomagnetic activity. Isolated minor 
shortwave fadeouts are possible.

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