[ips-sf] IPS Summary Forecast for 31 December - issued 2355UT/30-Dec-2015 [SEC=UNCLASSIFIED]

[rwc]

Solar activity was at low levels on UT day 30 December. Today's
largest event was a C1 flare. Solar wind speed stayed close to 360
km/s during the UT day today. Low levels of solar activity may be
expected for the next three days with the possibility of M-class
event. Solar wind stream is currently at normal levels but expected to
get strong later on 31 December due to the expected arrival of a CME.
Mostly quiet levels of geomagnetic activity were observed on UT day 30
December against the expectations of activity levels rising to major
storm levels. The CME that was anticipated to raise the activity
levels to major storm levels on 30 December, seems to be travelling
slower than the estimations. The CME is likely to raise the
geomagnetic activity levels to major storm levels on 31 December and
then gradually decline to minor storm through to unsettled levels on 1
January. Aurora sightings are likely on 31 December and 1 January.
Observed MUF's for the UT day 30 December were mostly near predicted
monthly values. Minor to significant degradations in HF conditions and
depressions in MUFs may be expected on 31 December and 1 January due
to expected rise in geomagnetic activity levels on these days.

Space Weather Services              email: asfc at ips.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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