[Ips-dhfpr] SWS Daily HF Prop Report - 17 November 21 issued 2331 UT on 17 Nov 2021
Regional Warning Centre
rwc at ips.gov.au
Thu Nov 18 10:31:06 EST 2021
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 NOVEMBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (17 NOVEMBER)
Date T index Conditions
17 Nov -5 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Depressed by 25% during local night.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 15% during local night.
Depressed by 20% after local dawn.
Southern Australian Region:
Depressed by 20% during local day.
Depressed by 15% during local night.
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
Oct 18
Nov 32
Dec 35
2. FORECAST (18 NOVEMBER - 20 NOVEMBER)
Date T index Conditions MUFs
18 Nov -5 Normal 15 to 20% below predicted monthly
values
19 Nov 0 Normal 15 to 20% below predicted monthly
values
20 Nov 5 Normal Depressed 15%/near predicted
monthly values
COMMENT: SWS HF Communications Warning 35 was issued on 15 November
and is current for 16-18 Nov. MUFs in the Australian region on
UT day 17 November were mostly moderately depressed due to coronal
hole effects and very low levels of ionising radiation. Mildly
to moderately depressed MUF conditions are expected to continue
for the next three UT days, 18 to 20 November in the Australian
region.
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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
Bureau of Meteorology
PO Box 1386 WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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