[Ips-dhfpr] SWS Daily HF Prop Report - 28 May 19 issued 2332 UT on 28 May 2019
Regional Warning Centre
rwc at ips.gov.au
Wed May 29 09:32:04 EST 2019
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 MAY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (28 MAY)
Date T index Conditions
28 May -4 Normal
Flares: none.
MUFs:
Cocos Island Region:
Enhanced by 20% during local day.
Enhanced by 20% during local night.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 35% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 30% during local night.
Southern Australian Region:
Depressed by 15% during local day.
Enhanced by 30% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 20% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Apr 1
May -12
Jun -12
2. FORECAST (29 MAY - 31 MAY)
Date T index Conditions MUFs
29 May -5 Normal Near predicted monthly values
30 May -10 Normal Near predicted monthly values/depressed
10 to 20%
31 May -15 Normal Near predicted monthly values/depressed
10 to 30%
COMMENT: Maximum usable frequencies (MUFs) ranged mostly from
near predicted monthly values to moderately enhanced ones for
Australian regions and Antarctica. Variable conditions with mild
enhancements and depressions were observed in Southern 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 29 May due to elevated geomagnetic
activity on this day. Possible MUF depressions of 10%-30% for
Australian regions are expected for 30-31 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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