[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 March 24 issued 2330 UT on 18 Mar 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 MARCH 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 MARCH) 
Date   T index  Conditions    
18 Mar   131    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.7    0332UT  possible   lower  E. Asia/Aust.
  M1.0    0414UT  possible   lower  E. Asia/Aust.
  M6.7    1919UT  probable   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 70% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      138
Mar      111
Apr      112


2. FORECAST (19 MARCH - 21 MARCH)
Date   T index  Conditions       MUFs                              
19 Mar   130    Normal           Near to 15% above predicted 
                                 monthly values
20 Mar   130    Normal           Near to 15% above predicted 
                                 monthly values    
21 Mar   130    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 27 was issued on 
17 March and is current for 17-19 Mar. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 18-Mar were near predicted 
monthly values to 20-35% enhanced. Ionospheric scintillation 
was observed at Darwin and Weipa at 18/1059-1410UT. MUFs are 
expected to be near predicted monthly values to 15% enhanced 
over 19-21 Mar. Shortwave fadeouts are probable.

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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