[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 April 24 issued 2330 UT on 23 Apr 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 APRIL 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 APRIL) 
Date   T index  Conditions    
23 Apr   142    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0 22/2318UT  possible   lower  West Pacific
  M3.6    0319UT  possible   lower  E. Asia/Aust.
  M3.0    0821UT  possible   lower  Mid East/Indian
  M1.0    1651UT  possible   lower  South American/
                                    Atlantic
  M2.9    1744UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 80% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 40% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      120
Apr      114
May      115


2. FORECAST (24 APRIL - 26 APRIL)
Date   T index  Conditions       MUFs                              
24 Apr   140    Normal           Near to 15% above predicted 
                                 monthly values
25 Apr   140    Normal           Near to 15% above predicted 
                                 monthly values    
26 Apr   140    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 40 was issued on 
21 April and is current for 22-24 Apr. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 23-Apr were near predicted 
monthly values to 15-20% enhanced. Spread-F was observed at Hobart 
and Perth during local night hours. MUFs in the Australian region 
are expected to be near predicted monthly values to 15% enhanced 
over 24-26 Apr. 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