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

[Regional Warning Centre]

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

1. SUMMARY (23 NOVEMBER) 
Date   T index  Conditions    
23 Nov   100    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0339UT  possible   lower  E. Asia/Aust.
  M1.1    1437UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 20% 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 (24 NOVEMBER - 26 NOVEMBER)
Date   T index  Conditions       MUFs                              
24 Nov   110    Normal           Near predicted monthly values
25 Nov   110    Normal           Near predicted monthly values    
26 Nov    90    Fair             Near predicted monthly values 
                                 to 15-20% depressed   

COMMENT: ASWFC SWF HF Communications Warning 117 was issued on 
22 November and is current for 23-24 Nov. Maximum usable frequencies 
(MUFs) were near predicted monthly values to 20% depressed in 
the Australian region on 23-Nov. Sporadic-E and spread-F was 
observed at Hobart during local day and night hours. MUFs are 
expected to be mostly near predicted monthly values over 24-25 
Nov. MUFs may become depressed by 15-20% by 26-Nov due to anticipated 
geomagnetic activity.

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