[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 August 23 issued 2330 UT on 23 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 AUGUST) 
Date   T index  Conditions    
23 Aug   115    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1 22/2304UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Enhanced by 50% during local day.
      Enhanced by 55% during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 25% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jul      103
Aug      88
Sep      84


2. FORECAST (24 AUGUST - 26 AUGUST)
Date   T index  Conditions       MUFs                              
24 Aug   120    Normal           Near to 15% above predicted 
                                 monthly values
25 Aug   120    Normal           Near to 15% above predicted 
                                 monthly values    
26 Aug   120    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 81 was issued on 
22 August and is current for 23-24 Aug. Maximum usable frequencies 
on UT day 23-Aug were near predicted monthly values to 25% enhanced 
in the southern Australian region and near predicted monthly 
values in the northern Australian region. Spread-F was observed 
at Hobart during local night hours. MUFs are expected to be near 
predicted monthly values to 15% enhanced over 24-26 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