I would hope you would be using truly 3D hypocenters so as you fly around we can see the dip of the subdection zone and the steeper recent M7.1 aftershock (and its aftershocks). I may answer more later, but my gut reaction would be 2 minutes or 5 minutes but not longer. Or, have it so speed can be set by viewer.

Depends on the audience but kind of doubt music would go over well given the fatalities. A narration explaining what people are looking at may or may not be a good idea.
Chris