Definitely Effect, not Area, yes.

You might wanna put the damage down like this:

'Foes struck by a meteor take force damage equal to 1D4 / 2 caster levels, and must succeed a reflex save or be knocked prone.'

Should make it a little easier to read. On the whole, I like it bob, it offers a reasonably utilitarian alternative to the standard Evocations of the same levels, and has the added benefit of a knockdown rider. As we both know, BFC options are a great way of adding interest to a blaster, and these do that nicely.