What is the best disaster movie (sci-fi)

I'm trying to find a new movie that relates to sci-fi but not a horror that relates to disaster's (volcanic or earthquakes) it doesn't bother me what it is...

I've seen several movies like Twister, San Andreas Quake, I also like the documentary for the same name video. Got any idea's?

I LOVE BLACK HAWK DOWN MOVIE what is you fav movie?

is that a disaster movie or just some random movie i never heard of? (LOOKING FOR disaster movie recommendations here!)