[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 October 24 issued 2331 UT on 17 Oct 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 OCTOBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 OCTOBER) 
Date   T index  Conditions    
17 Oct   141    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0223UT  possible   lower  E. Asia/Aust.
  M2.4    0505UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
   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.
      Enhanced by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      147
Oct      116
Nov      115


2. FORECAST (18 OCTOBER - 20 OCTOBER)
Date   T index  Conditions       MUFs                              
18 Oct   140    Normal           Near predicted monthly values 
                                 to 15% enhanced
19 Oct   140    Normal-fair      Near predicted monthly values 
                                 to 15% enhanced    
20 Oct   140    Normal           Near predicted monthly values 
                                 to 15% enhanced   

COMMENT: ASWFC SWF HF Communications Warning 118 was issued on 
16 October and is current for 16-18 Oct. Maximum usable frequencies 
(MUFs) in the Australian region on 17-Oct were generally near 
predicted monthly values to 15% enhanced. Spread F was observed 
during local night hours at Hobart. MUFs are expected to be near 
predicted monthly values to 15% enhanced over the 18-20 Oct. 
Brief minor shortwave fadeouts were observed 17/0220-0228UT and 
17/0501-0514UT. Equatorial scintillation was observed at Darwin 
17/1352-1410UT. A mild degradation in HF conditions may be experienced 
18-19 Oct for the southern Australian region during local night 
hours. Shortwave fadeouts are possible.

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