[Ips-dhfpr] SWS Daily HF Prop Report - 19 February 20 issued 2334 UT on 19 Feb 2020
rwc
rwc at ips.gov.au
Thu Feb 20 10:34:35 EST 2020
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 FEBRUARY 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (19 FEBRUARY)
Date T index Conditions
19 Feb -31 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
Depressed by 15% during local day.
Near predicted monthly values during local night.
Niue Island Region:
Depressed by 15% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Depressed by 35% during local day.
Enhanced by 15% during local night.
Southern Australian Region:
Depressed by 20% during local day.
Depressed by 15% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Jan -20
Feb -16
Mar -16
2. FORECAST (20 FEBRUARY - 22 FEBRUARY)
Date T index Conditions MUFs
20 Feb -16 Normal Near predicted monthly values.
Occasional depressions to 20%
possible
21 Feb -5 Normal Near predicted monthly values
22 Feb -10 Normal Near predicted monthly values
COMMENT: SWS HF Communications Warning 1 was issued on 19 February
and is current for 19-20 Feb. Maximum usable frequencies (MUFs)
for UT day 19 February were near predicted monthly to 20% depressed.
Some deeper depressions observed at lower latitudes. Spread F
observed at Darwin and Hobart during night. Sporadic E observed
during day and evening at Brisbane, Cocos Is., Norfolk Is., Learmonth
and Perth. MUFs are likely to be near predicted monthly values.
Some depressions to 20% possible. Night spread F and day and
evening sporadic E are possible on 20 February.
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For an explanation of some of the terms in this report, go to
http://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.
Space Weather Services email: asfc at bom.gov.au
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