[Ips-dhfpr] ASWFC Daily HF Prop Report - 01 June 25 issued 2330 UT on 01 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 JUNE) 
Date   T index  Conditions    
01 Jun    96    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      No data available during local day.
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 1700UT 31/05, Ended at 2035UT 01/06
 and, 10MeV Proton/PCA Event Began at 2135UT 01/06, Ended at 2215UT 01/06

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


2. FORECAST (02 JUNE - 04 JUNE)
Date   T index  Conditions       MUFs                              
02 Jun   100    Poor             Near predicted monthly values
03 Jun   100    Fair             Near predicted monthly values    
04 Jun   100    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 56 was issued 
on 31 May and is current for 2-4 Jun. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 01-Jun were near predicted 
monthly values with depressions of up to 15% observed during 
local night in the southern Australian region. Spread F was observed 
at Hobart during local night hours. MUFs are expected to be mostly 
near predicted monthly values with depressions during local night 
possible at higher latitudes over 02-04 Jun. Shortwave fadeouts 
are probable.

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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