My wife loves to watch disaster movies, and has no qualms about watching bad ones. As such, this movie qualifies.
The rationale for the events in this movie is entirely incomprehensible. There are two scientists (a woman and her boss) that discuss what could amount to an Extinction Level Event with less concern than you might while pondering where you should go for lunch.
The main character, his family, and another family drawn into this drama make nonsensical decisions one after another. It's definitely not "exciting", but you'll watch with wonder as they do it. The teenage daughter is one of the worst humans depicted on screen.
The effects and props are some of the cheapest I have seen.