'San Andreas' Depicts a Devastating West Coast Earthquake

ABC News' Nick Watt reports on how realistic events in the summer blockbuster really are.
2:33 | 06/01/15

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Transcript for 'San Andreas' Depicts a Devastating West Coast Earthquake
Now to that new blockbuster "San Andreas" raising questions about what would really happen if the big one hit. It was a number one movie over the weekend and nick watt has done some fact checking and joins us from earthquake simulator. Good morning, nick. Reporter: Good morning, robin. Well, the simulator here is set to 8.0 and it feels pretty real but a lot of seismologists are saying that the movie "San Andreas" isn't quite so real. The rock. Oh, my god. Reporter: Rubble and a $53 million opening weekend. I found fault in their fault. Everything was exaggerated. Hold on. We got to get over it. Reporter: Number one the San Andreas fault could never kick up a tsunami because it's on land. The Earth will literally crack open. Reporter: Number two, this fault line only rubs together, never games wide open. The only falls that open up are ones that don't produce earthquakes. Reporter: A 9.6 is not feasible in California. They say 8.3 is the worst that could hammer the golden state. That's still pretty bad. Number four, in a quake, strong enough to crack the Hoover dam. Even the rock would wobble. No way he could run. It was great fun, I just wouldn't try to learn seismology from it. Reporter: She says they did get some important stuff right. Drop, cover and hold on. Because your life is going to depend on it. Reporter: That's sound advice and, yes, aftershocks happen, one quake can trigger others. People need to know that the shaking is not over. We'll get hit again and it's going to be a bigger monster. Reporter: And the fear, spot-on. We're going to get our daughter, I promise. I love you, dad. Don't you quit on me. And you know what, when it comes to earthquake preparedness, it's good to make people scared so "San Andreas" has done its job. I'm scared. I've got a kit. This afternoon I'll stockpile bottled water and canned corn in my garage. Robin. The canned corn. That's combat -- Absolutely but people on the west coast say that is no joke and they -- I lived there. You definitely wanted to have that kit ready to go. And be prepared but thanks to nick now to some incredible

This transcript has been automatically generated and may not be 100% accurate.

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