[Ips-dhfpr] ASWFC Daily HF Prop Report - 29 August 22 issued 2330 UT on 29 Aug 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Tue Aug 30 09:30:53 EST 2022
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/29 AUGUST 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (29 AUGUST)
Date T index Conditions
29 Aug 48 Normal-fair
Flares Max Fadeout Freq. Sectors
M3.4 0338UT possible lower E. Asia/Aust.
M8.7 1107UT probable lower European
M2.6 1456UT possible lower South American/
Atlantic
M2.6 1705UT possible lower South American/
Atlantic
M4.7 1857UT possible lower East Pacific/
North American
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Depressed by 35% during local night.
Niue Island Region:
Depressed by 25% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 25% during local night.
Depressed by 20% after local dawn.
Southern Australian Region:
Near predicted monthly values during local day.
Depressed by 20% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 25% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Jul 65
Aug 67
Sep 68
2. FORECAST (30 AUGUST - 01 SEPTEMBER)
Date T index Conditions MUFs
30 Aug 50 Normal-fair Near predicted monthly values
to 20% depressed
31 Aug 60 Normal-fair Near predicted monthly values
01 Sep 60 Normal-fair Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 65 was issued on
29 August and is current for 29-31 Aug. Maximum usable frequencies
(MUFs) on UT day 29-Aug were near predicted monthly to 25% depressed,
particularly during local night. Spread F was observed at northern
Australian sites over local night. Sporadic E was observed at
most sites. Regional MUFs are expected to be mostly near predicted
monthly values over 30-Aug to 01-Sep, with mild depressions possible
on 30-Aug due to the combined effects of coronal hole high speed
wind streams and a glancing blow from a CME first observed on
27-Aug. Mild depressions are also possible during local night
over 30-31 Aug.
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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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