[Ips-dhfpr] SWS Daily HF Prop Report - 18 May 22 issued 2331 UT on 18 May 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Thu May 19 09:31:07 EST 2022
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 MAY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 MAY)
Date T index Conditions
18 May 87 Normal
Flares Max Fadeout Freq. Sectors
M1.1 2202UT possible lower East Pacific/
North American
MUFs:
Cocos Island Region:
Enhanced by 75% during local day.
Enhanced by 50% during local night.
Enhanced by 20% after local dawn.
Niue Island Region:
Enhanced by 45% during local day.
Near predicted monthly values during local night.
Enhanced by 35% after local dawn.
Northern Australian Region:
Enhanced by 15% during local day.
Enhanced by 15% during local night.
Enhanced by 30% after local dawn.
Southern Australian Region:
Enhanced by 20% during local day.
Enhanced by 15% during local night.
Enhanced by 25% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Apr 77
May 51
Jun 54
2. FORECAST (19 MAY - 21 MAY)
Date T index Conditions MUFs
19 May 85 Normal Near to 15% above predicted
monthly values
20 May 85 Normal Near to 15% above predicted
monthly values
21 May 85 Normal Near to 15% above predicted
monthly values
COMMENT: SWS SWF HF Communications Warning 44 was issued on 17
May and is current for 17-19 May. Maximum usable frequencies
(MUFs) on UT day 18-May were near monthly predicted values to
slightly enhanced. Spread-F was observed at Hobart during 1100-2100UT.
MUFs are expected to be mostly near monthly predicted values
to slightly enhanced during 19-21 May. Short-wave fadeouts are
possible during this period.
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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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