[Ips-dhfpr] SWS Daily HF Prop Report - 11 December 21 issued 2331 UT on 11 Dec 2021
Regional Warning Centre
rwc at ips.gov.au
Sun Dec 12 10:31:09 EST 2021
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 DECEMBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (11 DECEMBER)
Date T index Conditions
11 Dec 9 Normal
Flares: none.
MUFs:
Cocos Island Region:
Depressed by 20% during local day.
Near predicted monthly values during local night.
Niue Island Region:
Enhanced by 20% during local day.
Near predicted monthly values during local night.
Depressed by 40% after local dawn.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 20% during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Nov 3
Dec 33
Jan 36
2. FORECAST (12 DECEMBER - 14 DECEMBER)
Date T index Conditions MUFs
12 Dec 10 Normal Depressed 15%/near predicted
monthly values
13 Dec 10 Normal Depressed 15%/near predicted
monthly values
14 Dec 10 Normal Depressed 15%/near predicted
monthly values
COMMENT: SWS HF Communications Warning 38 was issued on 9 December
and is current for 10-12 Dec. MUFs in the Australian region on
UT day 11 December were variable ranging from 40% depressed at
times to near predicted monthly values, possibly due to low levels
of ionising solar flux. Similar conditions are expected during
12-14 December. Strong sporadic E were observed at some sites.
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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.
Space Weather Services email: asfc at bom.gov.au
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Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
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