[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 August 22 issued 2331 UT on 17 Aug 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 AUGUST 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 AUGUST) 
Date   T index  Conditions    
17 Aug    69    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    1345UT  possible   lower  European
  M1.1    1453UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jul      65
Aug      67
Sep      68


2. FORECAST (18 AUGUST - 20 AUGUST)
Date   T index  Conditions       MUFs                              
18 Aug    55    Fair             Near predicted monthly values
19 Aug    55    Normal-fair      Near predicted monthly values    
20 Aug    55    Fair             Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 17-Aug were 
mostly near predicted monthly values. Spread-F was observed during 
local night at Learmonth, Darwin, Townsville and Brisbane. MUFs 
are expected to be mostly near predicted monthly values with 
mild depressions possible for the southern Australian region 
over 18-20 Aug due to the combined effects of a coronal hole 
high speed wind stream and the impact of CMEs first observed 
on 14-Aug, 15-Aug, 16-Aug and 17-Aug.

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