[ips-sf] IPS Summary Forecast for 22 January - issued 2325UT/21-Jan-2015

[rwc]

An unnamed solar Active Region (AR) is located just beyond the south
east limb of the visible disk and will shortly rotate into view. This
region has already produced five substantial C-class X-ray flares The
largest flare was a C9.9 event peaking at 11:42 UT on Jan 21. The
three day outlook is for substantial C class flares and the
possibility of isolated M class flares. Fast solar wind flows
associated with a coronal hole arrived at Earth on Jan 21. The solar
wind speed increased from about 300 km/s to a maximum of about 550
km/s. The arrival of these faster flows drove active geomagnetic
conditions. The geomagnetic conditions are expected to be unsettled,
possibly active, during Jan 22-23. Conditions for HF radio
communication were slightly depressed throughout the southern part of
the Australian region during Jan 21. They are expected to be depressed
today.

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