[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 June 23 issued 2330 UT on 19 Jun 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 JUNE 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 JUNE) 
Date   T index  Conditions    
19 Jun    99    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0350UT  possible   lower  E. Asia/Aust.
  M1.1    1214UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15-20% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

PCA Event : No event.

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


2. FORECAST (20 JUNE - 22 JUNE)
Date   T index  Conditions       MUFs                              
20 Jun   100    Normal-fair      Near to 15% above predicted 
                                 monthly values
21 Jun   100    Normal-fair      Near to 15% above predicted 
                                 monthly values    
22 Jun   100    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 56 was issued on 
18 June and is current for 19-21 Jun. Maximum usable frequencies 
(MUFs) on UT day 19-Jun in the Australian region were generally 
near predicted monthly values. Strong spread F was observed during 
local night hours for the south eastern Australian region and 
at Townsville. MUFs are expected to be mostly near predicted 
values to 15% enhanced over 20-22 Jun. Mildly degraded conditions 
may be experienced during local night hours. A very brief minor 
fadeout restricted to lower HF frequencies was observed at Darwin 
at 19/0350UT. Isolated minor shortwave fadeouts are possible.

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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