[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 June 24 issued 2330 UT on 08 Jun 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 JUNE 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 JUNE) 
Date   T index  Conditions    
08 Jun   134    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.8    0028UT  possible   lower  West Pacific
  M3.4    0051UT  possible   lower  West Pacific
  M9.7    0150UT  probable   lower  West Pacific
  M1.5    0528UT  possible   lower  E. Asia/Aust.
  M1.2    0844UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 08 06 2024 0250UT and is in progress
 and, 100MeV Proton/PCA Event Began at 0215UT 08/06, Ended at 1435UT 08/06

Monthly T index:
Month  T index
May      121
Jun      116
Jul      117


2. FORECAST (09 JUNE - 11 JUNE)
Date   T index  Conditions       MUFs                              
09 Jun   120    Normal           Near predicted monthly values
10 Jun   105    Fair             Near predicted monthly values 
                                 to 20% depressed    
11 Jun   100    Fair             Near predicted monthly values 
                                 to 20% depressed   

COMMENT: ASWFC SWF HF Communications Warning 62 was issued on 
8 June and is current for 8-10 Jun. ASWFC Preliminary HF Communications 
Warning 63 was issued on 8 June and is current for 10-12 Jun. 
Maximum usable frequencies (MUFs) on UT day 08-Jun were mostly 
near predicted values to 15% enhanced. Spread-F was observed 
in Darwin and Hobart during local night hours. A polar cap absorption 
event began from around 08/0300 UT and is ongoing, blacking out 
radio signals at high latitudes. MUFs are expected to be near 
predicted monthly values on 09-Jun, but expected to become depressed 
after the CME arrival on 10-Jun into 11-Jun by 20%.

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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