[Ips-dhfpr] SWS Daily HF Prop Report - 28 December 18 issued 2330 UT on 28 Dec 2018 [SEC=UNCLASSIFIED]
Regional Warning Centre
rwc at ips.gov.au
Sat Dec 29 10:30:20 EST 2018
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (28 DECEMBER)
Date T index Conditions
28 Dec -28 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
No data available.
Niue Island Region:
Near predicted monthly values during local day.
Depressed by 35% during local night.
Northern Australian Region:
Enhanced by 20% during local day.
Depressed by 35% during local night.
Southern Australian Region:
Depressed by 15% during local day.
Depressed by 20% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Nov -32
Dec -8
Jan -9
2. FORECAST (29 DECEMBER - 31 DECEMBER)
Date T index Conditions MUFs
29 Dec -40 Normal-fair Near predicted monthly values/depressed
10 to 30%
30 Dec -40 Normal-fair Near predicted monthly values/depressed
10 to 30%
31 Dec -20 Normal-fair Near predicted monthly values
COMMENT: SWS HF Communications Warning 31 was issued on 26 December
and is current for 27-29 Dec. On 28 December, MUFs ranged from
Minor depressions to near predicted monthly values, with some
severe MUF depressions during the local night in the Niue Island
and Northern Australian regions. Strong Sporadic E layers were
seen across the Australian region and in Antarctica. Similar
levels of ionospheric support expected for the next 3 days due
to continued very low levels of ionising radiation from the Sun
and current increase in geomagnetic activity.
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For an explanation of some of the terms in this report, go to
http://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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