[ips-sf] IPS Summary Forecast for 18 June - issued 2333UT/17-Jun-2013

[rwc]

A large group of sunspots is located in the south east quadrant of the
Sun. This group produced four C class solar X-ray flares during the UT
day of June 17. The largest sunspot (Active Region 1775) is growing in
complexity and may produce an M class flare in comming days. There is
a small chance it will produce an X class flare. A large coronal hole
is located in the northern hemisphere and will rotate into a
geoeffective position in comming days. Spacecraft observations show
multiple Coronal Mass Ejections (CMEs) leaving the Sun throughout June
16-17, including a partial halo event towards the east, west and
south. The solar wind speed and density were very light today and they
are expected to increase late today and tomorrow. Geomagnetic
conditions may become unsettled late today and tomorrow. High
frequency radio communication may be slightly above predicted values
due to increasing solar EUV flux.

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