[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 September 24 issued 2330 UT on 13 Sep 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 SEPTEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 SEPTEMBER) 
Date   T index  Conditions    
13 Sep   122    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.6    0137UT  possible   lower  West Pacific
  M2.1    0434UT  possible   lower  E. Asia/Aust.
  M1.8    0531UT  possible   lower  E. Asia/Aust.
  M5.4    0656UT  possible   lower  Mid East/Indian
  M1.2    1509UT  possible   lower  South American/
                                    Atlantic
  M1.4    1756UT  possible   lower  South American/
                                    Atlantic
  M1.1    2049UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 25% during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      159
Sep      117
Oct      116


2. FORECAST (14 SEPTEMBER - 16 SEPTEMBER)
Date   T index  Conditions       MUFs                              
14 Sep   120    Fair             Near predicted monthly values
15 Sep   135    Normal-fair      Near to 15% above predicted 
                                 monthly values    
16 Sep   145    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 101 was issued on 
13 September and is current for 13-15 Sep. Maximum usable frequencies 
(MUFs) in the northern Australian region on UT day 13-Sep were 
near predicted monthly values. MUFs in the southern Australian 
region were depressed by up to 25%, with the strongest depressions 
observed during local daylight hours. Spread F was observed at 
Hobart. Ionospheric scintillation was observed at Weipa at 1028UT. 
MUFs are expected to be near predicted monthly values on 14-Sep, 
with a chance of degradations in the southern Australian region, 
and near predicted monthly values to 15% enhanced over 15-16 
Sep. Shortwave fadeouts are probable.

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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