[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 June 23 issued 2331 UT on 15 Jun 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 JUNE 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 JUNE) 
Date   T index  Conditions    
15 Jun    92    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.
      Increased absorption (~2db) briefly observed at Mawson 15/1800-1900UT.

PCA Event : No event.

Monthly T index:
Month  T index
May      98
Jun      88
Jul      87


2. FORECAST (16 JUNE - 18 JUNE)
Date   T index  Conditions       MUFs                              
16 Jun    85    Normal-fair      Near predicted monthly values
17 Jun    85    Normal           Near predicted monthly values    
18 Jun    85    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 15-Jun were 
near predicted monthly values in the Australian region. Strong 
spread F was observed at Hobart and Townsville during local night 
hours. Mildly depressed MUFs (15%) were observed at Hobart after 
local dawn this morning. MUFs are expected to be mostly near 
predicted values over 16-18 Jun. Mildly degraded conditions may 
be experienced during local night hours. Southern Australian 
region MUFs may become mildly depressed over 16-17-Jun in association 
with mild geomagnetic activity induced by a coronal hole wind 
stream.

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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