[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 June 25 issued 2349 UT on 15 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 JUNE) 
Date   T index  Conditions    
15 Jun    64    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M6.8 14/2301UT  probable   lower  West Pacific
  M2.2    0756UT  possible   lower  Mid East/Indian
  M1.9    1047UT  possible   lower  European
  M8.4    1807UT  probable   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
   Southern Australian Region:
      Depressed by 35%.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

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


2. FORECAST (16 JUNE - 18 JUNE)
Date   T index  Conditions       MUFs                              
16 Jun    90    Normal-fair      10 to 20% below predicted monthly 
                                 values
17 Jun   110    Normal           Near predicted monthly values    
18 Jun   110    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 62 was issued 
on 13 June and is current for 13-16 Jun. 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 16-Jun were generally 30-40% depressed in the Australian 
region. Southern region MUFs were depressed by 35% throughout 
the day. Northern region MUFs were near predicted monthly values 
during the local day becoming depressed by up to 40% during the 
local night. Spread F was generally observed during local night 
hours. For 16-Jun MUFs in the Australian region are generally 
expected to be initially depressed 10-20% for southern Australian 
region and near predicted monthly values for the northern Australian 
region.\. Isolated brief minor 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