Is San Andreas real? Could the earthquake in San Andreas happen? Or could a 10.0 Earthquake happen? Will San Andreas Happen? What about California's BIG ONE? San Andreas EXPLAINED! The Rock (Dwayne Johnson) battles nature as he attempts to escape the super earthquake rocking Los Angeles, but could this magnitude earthquake really happen? The movie revolves around the concept of the “big one” earthquake tearing apart the San Andreas fault. San Andreas’ earthquake comes in at a whopping 10.0 on the Richter Scale, prompting Paul Giamatti to exclaim “The Earth will literally crack open.” The quake depicted is bigger than the world’s worst earthquakes, the Japan Earthquake 2011, the Chile Earthquake, and the Alaska Earthquake. There’s even a tsunami like the japan tsunami.