[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 April 23 issued 2331 UT on 11 Apr 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 APRIL) 
Date   T index  Conditions    
11 Apr   119    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    1016UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 40-80% during local day.
   Niue Island Region:
      Enhanced by 15% 
   Northern Australian Region:
      Enhanced by 15-60% 
   Southern Australian Region:
      Enhanced by 15-25% 
   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
Mar      132
Apr      84
May      84


2. FORECAST (12 APRIL - 14 APRIL)
Date   T index  Conditions       MUFs                              
12 Apr   130    Normal           Near to 15% above predicted 
                                 monthly values
13 Apr   130    Normal-fair      Near to 15% above predicted 
                                 monthly values    
14 Apr   130    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 35 was issued on 
10 April and is current for 10-12 Apr. Maximum usable frequencies 
(MUFs) on UT day 11-Apr in the Australian region were enhanced 
by 15-80%. Stong enhancements were observed at Cocos Island. 
Spread F observed during local night hours at Hobart. MUFs are 
expected to be near predicted monthly values to 15% enhanced 
over 11-13 Apr. Mild degradations are possible during local night 
hours on 12-14 Apr, due to expected mild increase in geomagnetic 
activity. Isolated shortwave fadeouts are 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