[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 July 23 issued 2333 UT on 13 Jul 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 JULY) 
Date   T index  Conditions    
13 Jul   100    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.1    1920UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 40% during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jun      98
Jul      91
Aug      88


2. FORECAST (14 JULY - 16 JULY)
Date   T index  Conditions       MUFs                              
14 Jul   100    Normal           Near predicted monthly values
15 Jul   100    Fair             Near predicted monthly values    
16 Jul   100    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 64 was issued on 
12 July and is current for 12-14 Jul. Maximum usable frequencies 
(MUFs) on UT day 13-Jul in the Australian region were generally 
near predicted monthly values. Spread F was observed during local 
night hours across the Australian region with stronger occurrences 
at higher latitudes. MUFs are expected to be near predicted monthly 
values over 14-16 Jul with a chance for depressions at high latitudes 
on 16-Jul, due to anticipated geomagnetic activity on 15-Jul. 
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