I watched this yesterday on disk with my wife, son, and his oldest son. As disaster movies go, it was up there with the best. Pretty well cast. Pretty well written. Pretty well directed. No complaints about the acting, good job. Plenty of action from start to finish. Excellent special affects.
I’m not a geologist, but even as an engineer, I could see some faults in it here and there (a little play on words can’t hurt). However, for the type of movie it is, those things don’t matter much.
If you like disaster movies, watch it if you missed it in theaters.
However, given the now often up close news coverage of real disasters, it takes a lot to match reality. I happened to be having trouble sleeping at the time of the Japanese psunami. I found it live on TV by accident. It wasn’t the visual spectacle of fiction, but the realization of the actual reality dwarfs even the most spectacular disaster movie!