[Ips-dhfpr] ASWFC Daily HF Prop Report - 07 June 23 issued 2330 UT on 07 Jun 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/07 JUNE 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (07 JUNE) 
Date   T index  Conditions    
07 Jun    77    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M4.7    1146UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   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 (08 JUNE - 10 JUNE)
Date   T index  Conditions       MUFs                              
08 Jun    80    Normal-fair      Near predicted monthly values 
                                 to 20% depressed
09 Jun    85    Normal-fair      Near predicted monthly values 
                                 to 20% depressed    
10 Jun    90    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 55 was issued on 
7 June and is current for 8-9 Jun. Maximum usable frequencies 
(MUFs) on UT day 07-Jun were near predicted monthly values to 
20% depressed during local nights hours in the Australian region. 
Spread-F was observed at Brisbane, Darwin, Townsville and also 
Hobart during local night hours. Sporadic-E was observed at Canberra. 
MUFs are expected to be near predicted values during daylight 
over 08-10 Jun, with depressions up to 20% continuing during 
local night hours. Isolated shortwave fadeouts are possible.

----------------------------------------------------------
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