[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 April 23 issued 2330 UT on 25 Apr 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 APRIL) 
Date   T index  Conditions    
25 Apr   103    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 70% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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
Mar      132
Apr      84
May      84


2. FORECAST (26 APRIL - 28 APRIL)
Date   T index  Conditions       MUFs                              
26 Apr   110    Normal           Near to 15% above predicted 
                                 monthly values
27 Apr   100    Normal-fair      Near to 15% above predicted 
                                 monthly values    
28 Apr    90    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 25-Apr in 
the Australian region were enhanced by up to 25% in the Northern 
Australian region and 20% in the Southern Australian region during 
local day. Sporadic E was observed at Learmonth during local 
night. Spread F was observed at Hobart during local night. MUFs 
are expected to be near predicted monthly values to 15% enhanced 
over 26-28 Apr. Mild depressions are possible over 27-28 Apr 
due to geomagnetic activity.

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