[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 June 24 issued 2330 UT on 21 Jun 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 JUNE 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 JUNE) 
Date   T index  Conditions    
21 Jun   117    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M5.7 20/2316UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% 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
May      121
Jun      116
Jul      117


2. FORECAST (22 JUNE - 24 JUNE)
Date   T index  Conditions       MUFs                              
22 Jun   110    Normal           Near predicted monthly values
23 Jun   110    Normal           Near predicted monthly values    
24 Jun   110    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 68 was issued on 
21 June and is current for 21-23 Jun. Maximum usable frequencies 
(MUFs) on UT day 21-Jun in the Australian region were mostly 
near predicted values, with depressions of 20% during local night 
hours. Spread F was present along the east coast of Australia 
during local night hours. Sporadic-E was observed in Hobart. 
Conditions in Brisbane were generally degraded during local night 
hours. Scintillation was observed at Weipa from 21/1238-1358 
UT. MUFs are expected to be near predicted values over 22-24 
Jun.

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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