[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 February 23 issued 2330 UT on 25 Feb 2023 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sun Feb 26 10:30:55 EST 2023
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 FEBRUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (25 FEBRUARY)
Date T index Conditions
25 Feb 142 Normal
Flares Max Fadeout Freq. Sectors
M6/-- 1944UT probable lower East Pacific/
North American
MUFs:
Cocos Island Region:
Enhanced by 25% during local day.
Enhanced by 75% during local night.
Enhanced by 20% after local dawn.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 40% during local night.
Northern Australian Region:
Enhanced by 20% during local day.
Enhanced by 60% during local night.
Enhanced by 30% after local dawn.
Southern Australian Region:
Enhanced by 20% during local day.
Enhanced by 35% during local night.
Enhanced by 20% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
PCA Event : 10MeV Proton/PCA Event Began 26 02 2023 0800UT and is in progress
Monthly T index:
Month T index
Jan 119
Feb 75
Mar 76
2. FORECAST (26 FEBRUARY - 28 FEBRUARY)
Date T index Conditions MUFs
26 Feb 125 Normal-fair 20-30% above predicted values
27 Feb 80 Fair-poor Near predicted monthly values
28 Feb 70 Fair Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 22 was issued on
24 February and is current for 25-27 Feb. Maximum usable frequencies
(MUFs) in the Australian region on UT day 25-Feb were mostly
20-35% enhanced, and enhancements up to 60% were observed in
the northern Australian region during local night. Sporadic-E
was observed briefly in Learmonth and Brisbane during local dawn
hours. MUFs are expected to be 20-30% above predicted monthly
values on 26-Feb, then returning to near predicted monthly values
due to anticipated geomagnetic activity over 27-28 Feb. Shortwave
fadeouts are possible.
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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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