[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 June 25 issued 2330 UT on 16 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 JUNE) 
Date   T index  Conditions    
16 Jun    76    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    0000UT  possible   lower  West Pacific
  M1.8    0423UT  possible   lower  E. Asia/Aust.
  M6.4    0938UT  probable   lower  Mid East/Indian
  M1.4    1139UT  possible   lower  European
  M1.1    1455UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 35% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
May      94
Jun      109
Jul      107


2. FORECAST (17 JUNE - 19 JUNE)
Date   T index  Conditions       MUFs                              
17 Jun    90    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed
18 Jun    85    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed    
19 Jun    85    Normal-fair      Near predicted monthly values 
                                 to 15-20% depressed   

COMMENT: ASWFC SWF HF Communications Warning 65 was issued on 
15 June and is current for 15-17 Jun. Maximum usable frequencies 
(MUFs) in the Australian region on UT day were near predicted 
values to 30% depressed during local night hours. Conditions 
were heavily degraded in Townsville, Cocos Islands and Brisbane. 
MUFs may continue to be sporadically depressed by 10-20% during 
local night hours over the next few days due to possible coronal 
hole activity, although more likely will be near predicted values.

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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