'San Andreas' Debunked: What the Earthquake Film Got Wrong

Unlike in the movie, an 8.3-magnitude quake is likely the worst California could expect, a seismologist said.
2:17 | 06/02/15

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Transcript for 'San Andreas' Debunked: What the Earthquake Film Got Wrong
The movie "San Andreas" maybe rocking the multiplex right now but the scientists are not impressed. Here's ABC's nick watt. Reporter: The rock -- oh. Oh, my god. Reporter: Rubble. And $53 million opening weekend. I was really moved by the action. I was moved by the science. I was moved by -- I was moved by the reality of it. Reporter: Okay, action a, yeah. How about the science and the reality? The simulator is set to 8.0 and it feels pretty real. But I'm not a seismologist. The movie "San Andreas" isn't quite so real. I found fault in their fault. Everything was exaggerated. Hold on. We have to get over before it crests. Number one the San Andreas fault could never kick up a tsunami because it's on land. The Earth will literally crack open. Number two, this fault line only rubs toeb, never wide open. The 9.6 is not mooez feasible in California. They say 8.3 is the worst that could hammer the golden state and that's still pretty bad. Number four, in a quake strong enough to crack the Hoover dam, even the rock would wobble. No way could he work. It is fun but I wouldn't try to learn seismology from it. Reporter: She said they did get some important things right. Aftershocks can happen and one quake can trigger others. People need to know the shaking is not over. Reporter: And the fear spot on. Going to get our daughter. I promise. I love you, dad. Don't you quit on me. Reporter: And when it comes to making people prepare for the big one, getting them scared is half of the battle. "San Andreas" ten out of ten on that front. I'm nick watt for "Nightline" in es con california.

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

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