[Ips-dhfpr] SWS Daily HF Prop Report - 27 May 19 issued 2330 UT on 27 May 2019
Regional Warning Centre
rwc at ips.gov.au
Tue May 28 09:30:23 EST 2019
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 MAY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (27 MAY)
Date T index Conditions
27 May -3 Normal
Flares: none.
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 20% during local night.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 50% during local night.
Northern Australian Region:
Depressed by 15% during local day.
Enhanced by 25% during local night.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 25% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Apr 1
May -12
Jun -12
2. FORECAST (28 MAY - 30 MAY)
Date T index Conditions MUFs
28 May -5 Normal Near predicted monthly values
29 May -5 Normal Near predicted monthly values
30 May -15 Normal Near predicted monthly values/depressed
10 to 30%
COMMENT: Maximum usable frequencies (MUFs) ranged from near predicted
monthly values to moderately enhanced ones for Southern Australian
region and Antarctica. Variable conditions with mild enhancements
and depressions were observed in Equatorial and Northern Australian
regions. Notable periods of degraded ionospheric support for
Antarctic regions over the UT day. Similar HF conditions are
expected for the next 24 hours. Disturbed ionospheric support
is expected for high latitudes on 28-29 May due to elevated geomagnetic
activity on those days. Possible MUF depressions of 10%-30% for
Australian regions and continued disturbed ionospheric support
are expected for 30 May as a consequence of the predicted increase
in geomagnetic activity.
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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.
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