[ips-sf] IPS Summary Forecast for 23 January - issued 2349UT/22-Jan-2014

rwc rwc at ips.gov.au
Thu Jan 23 10:49:19 EST 2014

Solar activity was quiet to very quiet during 22 Jan UT. Solar
activity is expected to remain at the C-class level with a chance of
an M-class flare during the next 3 days. A partial halo Coronal Mass
Ejection (CME) observed leaving the east limb of the solar disk during
22 UT on 22 Jan was a far side event and it will not be geoeffective.
Coronal hole solar wind flows arriving at Earth briefly peaked at just
over 600 km/s during 07 UT on 22 Jan. The solar wind speed has been
declining and is presently fluctuating near about 475 km/s. The edge
of a partial halo CME launched during 22 UT on 20 Jan may arrive today
(23 Sep). The bulk of this CME was launched toward the east and its
terrestrial impact is expected to be modest. If the CME does impact
Earth, weak auroras may become visible low on the southern horizon
from the south coast of Tasmania. Ionospheric support for HF radio
communication is expected to be enhanced to strongly enhanced.

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