[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 February 23 issued 2331 UT on 18 Feb 2023 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sun Feb 19 10:31:07 EST 2023
SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 FEBRUARY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 FEBRUARY)
Date T index Conditions
18 Feb 112 Normal
Flares: none.
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 35% during local night.
Enhanced by 35% after local dawn.
Niue Island Region:
Enhanced by 25% during local day.
Enhanced by 20% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 20% during local night.
Enhanced by 20% after local dawn.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 20% 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
Jan 119
Feb 75
Mar 76
2. FORECAST (19 FEBRUARY - 21 FEBRUARY)
Date T index Conditions MUFs
19 Feb 120 Normal-fair Near to 15% above predicted
monthly values
20 Feb 80 Fair Near predicted monthly values
21 Feb 80 Normal Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 18 was issued on
17 February and is current for 18-20 Feb. ASWFC Preliminary HF
Communications Warning 19 was issued on 17 February and is current
for 19-21 Feb. Maximum usable frequencies (MUFs) in the Australian
region on 18-Feb were near predicted monthly values during local
day and up to 20% enhanced during local night. Spread F was observed
at Hobart and Canberra. MUFs are expected to be near predicted
monthly values to 15% enhanced on 19-Feb. MUFs are expected to
be near predicted monthly values on 20-21 Feb, with mild depressions
possible due to anticipated geomagnetic activity caused by CME
impacts. 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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