[Ips-dhfpr] SWS Daily HF Prop Report - 22 December 20 issued 2329 UT on 22 Dec 2020
rwc
rwc at ips.gov.au
Wed Dec 23 10:29:24 EST 2020
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 DECEMBER 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (22 DECEMBER)
Date T index Conditions
22 Dec -21 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
Depressed by 25% during local day.
Depressed by 25% during local night.
Niue Island Region:
No data available.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 15% during local night.
Southern Australian Region:
Depressed by 15% 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
Nov -6
Dec 5
Jan 8
2. FORECAST (23 DECEMBER - 25 DECEMBER)
Date T index Conditions MUFs
23 Dec -15 Normal Near predicted monthly values
24 Dec -30 Normal-fair 15 to 30% below predicted monthly
values
25 Dec -20 Normal Depressed 20%/near predicted
monthly values
COMMENT: SWS HF Communications Warning 13 was issued on 22 December
and is current for 22-24 Dec. MUFs in the Australian region were
mostly near predicted monthly values to moderately depressed
on UT day 22 Dec. Frequent strong sporadic E was observed over
some Australian sites. MUFs in the Australian region are expected
to be mildly depressed on 23 Dec. Deeper depressions are likely
on 24 Dec in response to the anticipated geomagnetic disturbance
associated with the coronal hole.
----------------------------------------------------------
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.
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