[Ips-dhfpr] ASWFC Daily HF Prop Report - 14 June 25 issued 2334 UT on 14 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/14 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (14 JUNE) 
Date   T index  Conditions    
14 Jun    65    Poor-fair      

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    1804UT  possible   lower  East Pacific/
                                    North American
  M6.8    2301UT  probable   lower  West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15-30% during local night.
   Southern Australian Region:
      Depressed by 30-35%.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 50% over the UT day.
      Strong spread F and sporadic E.

PCA Event : No event.

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


2. FORECAST (15 JUNE - 17 JUNE)
Date   T index  Conditions       MUFs                              
15 Jun    80    Fair-normal      Depressed 15 to 25%/near predicted 
                                 monthly values
16 Jun   110    Normal           Near predicted monthly values    
17 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. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 14-Jun were 30-40% 
depressed in the southern Australian region. Spread F was observed 
at Hobart and Canberra during local night hours. Northern Australian 
MUFs remained mostly near predicted monthly vales during the 
local day, becoming 15-30% depressed at times during local night 
hours. Antarctic conditions were again poor. For 15-Jun MUFs 
in the Australian region are generally expected to be initially 
depressed 15-25%, gradually recovering during the day as recent 
geomagnetic activity has now declined. A brief fadeouts was observed 
at 14/2300UT in association with the M6.8 flare impacting lower 
HF frequencies on the east coast of Australia. Isolated brief 
minor fadeouts are possible.

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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