[Ips-dhfpr] SWS Daily HF Prop Report - 22 April 22 issued 2331 UT on 22 Apr 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sat Apr 23 09:31:04 EST 2022
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 APRIL 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (22 APRIL)
Date T index Conditions
22 Apr 79 Normal
Flares Max Fadeout Freq. Sectors
M1.1 0515UT possible lower E. Asia/Aust.
M3.4 1325UT possible lower European
MUFs:
Cocos Island Region:
Enhanced by 70% during local day.
Enhanced by 105% during local night.
Niue Island Region:
Mostly near predicted monthly values.
Enhanced by 20% after local dawn.
Northern Australian Region:
Enhanced by 15% during local day.
Enhanced by 45% during local night.
Enhanced by 65% after local dawn.
Southern Australian Region:
Enhanced by 20% during local day.
Enhanced by 25% during local night.
Enhanced by 30% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Mar 64
Apr 46
May 49
2. FORECAST (23 APRIL - 25 APRIL)
Date T index Conditions MUFs
23 Apr 80 Normal Near to 15% above predicted
monthly values
24 Apr 80 Normal Near to 15% above predicted
monthly values
25 Apr 80 Normal Near to 15% above predicted
monthly values
COMMENT: SWS SWF HF Communications Warning 37 was issued on 21
April and is current for 22-24 Apr. Maximum usable frequencies
(MUFs) on UT day 22 Apr were enhanced over monthly predicted
values. Strong spread-F was observed at Brisbane and Hobart during
local night hours. MUFs are expected to be 15-20% enhanced over
monthly predicted values during 23-25 Apr. Short-wave fadeouts
are likely.
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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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