[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 June 23 issued 2331 UT on 24 Jun 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 JUNE 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 JUNE) 
Date   T index  Conditions    
24 Jun   113    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1217UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 45% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Enhanced by 15%.
   Southern Australian Region:
      Near to 15% above predicted monthly values.
   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
May      98
Jun      88
Jul      87


2. FORECAST (25 JUNE - 27 JUNE)
Date   T index  Conditions       MUFs                              
25 Jun   100    Normal-fair      Near predicted monthly values
26 Jun   100    Normal-fair      Near predicted monthly values    
27 Jun   100    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 58 was issued on 
23 June and is current for 23-25 Jun. Maximum usable frequencies 
(MUFs) on UT day 24-Jun in the Australian region were generally 
near predicted monthly values to 15% enhanced. Enhanced MUFs 
were observed at Cocos Island. Spread F was observed at Hobart 
and Townsville during local night hours. Mildly degraded HF conditions 
may be experienced during local night hours. MUFs are generally 
expected to be near predicted values over 25-27 Jun. Moderately 
degraded HF conditions may be experienced for the southern Australian 
region during local night hours on 25 and 26-Jun due to mildly 
increased geomagnetic activity from glancing CME blows. 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