[Ips-dhfpr] SWS Daily HF Prop Report - 25 April 22 issued 2330 UT on 25 Apr 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Tue Apr 26 09:30:54 EST 2022
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 APRIL 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (25 APRIL)
Date T index Conditions
25 Apr 83 Normal
Flares Max Fadeout Freq. Sectors
M1/-- 0402UT possible lower E. Asia/Aust.
MUFs:
Cocos Island Region:
Enhanced by 50% during local day.
Enhanced by 25% during local night.
Niue Island Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Enhanced by 25% during local day.
Enhanced by 70% during local night.
Enhanced by 45% after local dawn.
Southern Australian Region:
Enhanced by 25% during local day.
Near predicted monthly values 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
Mar 64
Apr 46
May 49
2. FORECAST (26 APRIL - 28 APRIL)
Date T index Conditions MUFs
26 Apr 85 Normal Near to 15% above predicted
monthly values
27 Apr 85 Normal Near to 15% above predicted
monthly values
28 Apr 85 Normal Near to 15% above predicted
monthly values
COMMENT: SWS SWF HF Communications Warning 38 was issued on 24
April and is current for 25-27 Apr. Maximum usable frequencies
(MUFs) on UT day 25 Apr were mostly above monthly predicted values.
MUFs are expected to be 15-25% above monthly predicted values
on 26-28 Apr due to high level of solar ionising flux. Short-wave
fadeouts are possible for the next three days.
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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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