SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (12 NOVEMBER)
Date T index Conditions
12 Nov 132 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
Enhanced by 20-35%.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Enhanced by 20%.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Enhanced by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Oct 130
Nov 100
Dec 98
2. FORECAST (13 NOVEMBER - 15 NOVEMBER)
Date T index Conditions MUFs
13 Nov 100 Normal Depressed 10 to 15%/near predicted
monthly values
14 Nov 120 Normal Near predicted monthly values
15 Nov 120 Normal Near predicted monthly values
COMMENT: ASWFC Preliminary HF Communications Warning 112 was
issued on 11 November and is current for 12-13 Nov. Maximum usable
frequencies (MUFs) in the Australian region on UT day 12-Nov
were near predicted monthly values to 20% enhanced. Spread F
was observed during local night hours at Hobart. The CME arrival
induced only mild geomagnetic activity and Australian region
MUFs are now generally expected to remain near predicted monthly
values, with some southern Australian region sites depressed
15% after local dawn this morning. These mild depressions are
not expected to persist. Isolated shortwave 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