[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 July 24 issued 2331 UT on 13 Jul 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (13 JULY) 
Date   T index  Conditions    
13 Jul   130    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0318UT  possible   lower  E. Asia/Aust.
  M5.3    1242UT  possible   lower  European
  M1.8    1530UT  possible   lower  South American/
                                    Atlantic
  M1.0    1930UT  possible   lower  East Pacific/
                                    North American
  M5.0    2301UT  confirmed  lower  West Pacific

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

PCA Event : No event.

Monthly T index:
Month  T index
Jun      120
Jul      118
Aug      117


2. FORECAST (14 JULY - 16 JULY)
Date   T index  Conditions       MUFs                              
14 Jul   115    Normal-fair      Near predicted monthly values
15 Jul   115    Fair-normal      Near predicted monthly values    
16 Jul   115    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 74 was issued on 
13 July and is current for 14-16 Jul. Maximum usable frequencies 
(MUFs) on UT day 13-Jul were near predicted values in the Australian 
region. Minor Spread F was observed during local night hours. 
Weak ionospheric scintillation was occasionally observed at Niue 
and Darwin during the interval 13/0800-1400UT. A fadeout was 
observed in the eastern Australian region with the M5.0 flare 
at 13/2301UT, impacting lower HF frequencies. MUFs are expected 
to be near predicted values over 14-16 Jul, with mildly degraded 
conditions possible during local night hours 14-15 Jul for the 
southern Australian region. Further shortwave fadeouts are probable.

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