[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 May 23 issued 2331 UT on 12 May 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 MAY) 
Date   T index  Conditions    
12 May   107    Normal         

Flares: none.

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

PCA Event : 10MeV Proton/PCA Event Began at 2325UT 09/05, Ended at 0350UT 11/05

Monthly T index:
Month  T index
Apr      120
May      87
Jun      88


2. FORECAST (13 MAY - 15 MAY)
Date   T index  Conditions       MUFs                              
13 May   105    Normal           Near to 15% above predicted 
                                 monthly values
14 May   105    Normal           Near to 15% above predicted 
                                 monthly values    
15 May   105    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 12-May were 
near predicted monthly values to 15% enhanced during local day. 
Spread-F was observed at Hobart, Brisbane and Townsville during 
local night hours. Sporadic E was observed at Canberra and Cocos 
Islands during local night, with small amounts observed at Darwin, 
Perth and Learmonth. MUFs are expected to be near predicted monthly 
values to 15% enhanced over 13-15 May. Isolated shortwave fadeouts 
are probable on 13-May, and possible over 14-15 May.

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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