Betty,  a quarter century ago I was working for a team of seismologists
at MIT.  I was doing computer stuff (and I bumped into Jody Kravitz who
was doing similar stuff in Illinois!), but I learned a little bit about
dealing with earthquakes.

The first thing that comes to mind is preventing future damage.  It is
possible to construct a new base upon which the carousel will rest that
can help insulate it from the motion of future earthquakes.  Think of
Spokane as an immense bowl of Jell-O.  Now float a huge slab of concrete
in it.  Put the carousel atop the slab.  That's one possibility.  But
don't rely on me; instead ask a good civil engineer for advice.  Others
will have suggestions for the actual mechanics of the carousel.

Don't forget to start planning now for the Immense Fundraiser Event
that will be needed.  From my perspective as someone who now operates
pony rides, I would suggest a festival, complete with pony rides!
If the carousel must be out of service for some time during its normal
season, ask your pony ride operator to run in its place, as a
consignment.  I can give you more info on how to find and keep a good
pony ride.  (Our ponies think that carousels are neat.  When we're near
one they try to talk to the carousel ponies, alas to no avail.)

Peter Neilson
Sanford NC