[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 May 23 issued 2331 UT on 18 May 2023 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Fri May 19 09:31:26 EST 2023
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 MAY)
Date T index Conditions
18 May 89 Normal
Flares Max Fadeout Freq. Sectors
M1.0 0626UT possible lower Mid East/Indian
M1.2 0655UT possible lower Mid East/Indian
M2.2 1147UT possible lower European
M1.1 1751UT possible lower South American/
Atlantic
M3.8 2023UT possible lower East Pacific/
North American
M4.5 2105UT possible lower East Pacific/
North American
MUFs:
Cocos Island Region:
Near predicted monthly values.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 30% during local night.
Northern Australian Region:
Near predicted monthly values.
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
Apr 120
May 87
Jun 88
2. FORECAST (19 MAY - 21 MAY)
Date T index Conditions MUFs
19 May 90 Normal Near predicted monthly values
20 May 95 Normal Near predicted monthly values
21 May 95 Normal Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 46 was issued on
18 May and is current for 18-20 May. Maximum usable frequencies
(MUFs) on UT day 18-May were near predicted monthly values in
the Australian region. Spread-F was observed at Darwin and Hobart
during local night hours. Small amounts of sporadic E were observed
across the Australian region. MUFs are expected to be near predicted
monthly values over 19-21 May. 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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