[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 December 23 issued 2330 UT on 16 Dec 2023 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sun Dec 17 10:30:58 EST 2023
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 DECEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (16 DECEMBER)
Date T index Conditions
16 Dec 79 Normal
Flares: none.
MUFs:
Cocos Island Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : 10MeV Proton/PCA Event Began at 2335UT 15/12, Ended at 0045UT 16/12
Monthly T index:
Month T index
Nov 114
Dec 100
Jan 98
2. FORECAST (17 DECEMBER - 19 DECEMBER)
Date T index Conditions MUFs
17 Dec 70 Fair Near predicted monthly values/depressed
15 to 30%
18 Dec 80 Normal Near predicted monthly values/depressed
0 to 15%
19 Dec 90 Normal Near predicted monthly values
COMMENT: ASWFC Preliminary HF Communications Warning 130 was
issued on 15 December and is current for 17-18 Dec. Maximum usable
frequencies (MUFs) were near predicted monthly values in the
Australian region on UT day 16-Dec. MUFs are generally expected
to be near predicted monthly values over 17-19 Dec, however a
degradation in ionospheric conditions is expected for the southern
Australian region over 17-18 Dec due to anticipated component
arrivals of CME activity observed on 14-Dec. 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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