[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 November 23 issued 2330 UT on 11 Nov 2023 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sun Nov 12 10:30:19 EST 2023
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (11 NOVEMBER)
Date T index Conditions
11 Nov 131 Normal
Flares Max Fadeout Freq. Sectors
M1.2 1730UT possible lower South American/
Atlantic
MUFs:
Cocos Island Region:
Enhanced by 20%.
Niue Island Region:
Enhanced by 30% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Enhanced by 15-30%.
Southern Australian Region:
Enhanced by 20% during local day.
Near predicted monthly values during local night.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Oct 130
Nov 100
Dec 98
2. FORECAST (12 NOVEMBER - 14 NOVEMBER)
Date T index Conditions MUFs
12 Nov 110 Normal-fair Near predicted monthly values/depressed
15 to 30%
13 Nov 80 Fair Depressed 15 to 30%/near predicted
monthly values
14 Nov 90 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 11-Nov
were near predicted monthly values to 30% enhanced. Ionospheric
conditions during the local day on 12-Nov are now expected to
be normal. Ionospheric propagation conditions are expected to
become degraded tonight for the southern Australian region. Depressions
of 15-30% are possible from late in the UT day on 12-Nov (after
local dawn 13-Nov) and on 13 Nov as a result of expected geomagnetic
activity, with the anticipated arrival of a halo CME first observed
09-Nov. 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
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