My understanding is that the location of a particle is indeterminate. That is you don't know 'where' the particle is. It could be any place in the universe. The probability that it in most locations is so small as to be totally ignorable, but you really don't know where it is. Where it winds up is where it interacts with something. As far as I can tell up to the very time that the interaction occurs it could still be any where. That is to say that at a time one Planck time unit before the interaction it could still be any where, or in another way of looking at it it is everywhere.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.