[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 November 23 issued 2331 UT on 28 Nov 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 NOVEMBER) 
Date   T index  Conditions    
28 Nov   143    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M3.4    1932UT  possible   lower  East Pacific/
                                    North American
  M9.8    1950UT  probable   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Oct      130
Nov      100
Dec      98


2. FORECAST (29 NOVEMBER - 01 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Nov   120    Normal           Near predicted monthly values 
                                 to 20% enhanced
30 Nov   100    Fair             Near predicted monthly values 
                                 to 20% depressed    
01 Dec    40    Poor             Significant depressions expected   

COMMENT: ASWFC SWF HF Communications Warning 121 was issued on 
28 November and is current for 28-30 Nov. Maximum usable frequencies 
(MUFs) were near predicted monthly values to 15% enhanced in 
the Australian region on UT day 28-Nov. Sporadic-E was observed 
at Brisbane, Canberra. Hobart and Pert during local night and 
dawn hours. MUFs are expected to be near predicted monthly values 
to 20% enhanced on 29-Nov. MUFs are expected to become initially 
depressed by 20% over 30-Nov due to two CME impacts, followed 
by further depressions on 01-Dec due to another anticipated impact. 
The extent of the depressions on 01-Dec is still being analysed.

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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