Barbara, This size of X-Flare is not unusual, but it is at this
point(begining) of the 11 year sun cycle. An unusual size would
be in the X30 range for the whole cycle. The flare doesn't affect
the earth that much. Its the Protons and CME from the flare that
affect the earth the most when directed at the earth.

To answer your question about 'what would happen', I'll give you a
link to look at. Near the end of the webpage are some answers to
your question. See link

• Sun Primer