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There are no
(zero) Richter 6.0
or greater
earthquakes in
the last 40 years.
Shown here are
three greater than
Richter 5.5. The
southernmost was
a 5.9 on 9/3/1978;
the middle orange
dot was a Richter
5.8 on 3/13/1989
and the
northernmost was
a 5.5 on
9/11/1996.  
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