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Richter 6.0 or
greater
earthquakes in
the last 35
years. Honshu
now more
discernible at
the lower left
and Kamchtka
at the upper
right. More
than 4000
earthquakes.
Bu increasing
the Richter by
an order of
magnitude we
decrease the
number of
events by an
order of
magnitude.
Now down to
just over 400.