[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 July 23 issued 2330 UT on 12 Jul 2023 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Thu Jul 13 09:30:15 EST 2023
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (12 JULY)
Date T index Conditions
12 Jul 96 Normal
Flares Max Fadeout Freq. Sectors
M5.8 11/2215UT possible lower East Pacific/
North American
M1.3 0445UT possible lower E. Asia/Aust.
M1.3 0514UT possible lower E. Asia/Aust.
M6.9 0855UT probable lower Mid East/Indian
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Depressed by 25% during local night.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 15% 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
Jun 98
Jul 91
Aug 88
2. FORECAST (13 JULY - 15 JULY)
Date T index Conditions MUFs
13 Jul 100 Normal Near predicted monthly values
14 Jul 100 Normal-fair Near predicted monthly values
15 Jul 100 Fair Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 64 was issued on
12 July and is current for 12-14 Jul. Maximum usable frequencies
(MUFs) on UT day 12-Jul in the Australian region were generally
near predicted monthly values. Spread F was observed during local
night hours at several Australian sites with stronger occurrences
at higher latitudes. MUFs are expected to be near predicted monthly
values over 13-15 Jul with a chance for mild depressions at high
latitudes on 14-Jul, due to anticipated geomagnetic activity
on 13-Jul. Shortwave fadeouts are probable.
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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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