<P> San Andreas is a 2015 American disaster film directed by Brad Peyton and written by Carlton Cuse, with Andre Fabrizio and Jeremy Passmore receiving story credit . The film stars Dwayne Johnson, Carla Gugino, Alexandra Daddario, Ioan Gruffudd, Archie Panjabi, and Paul Giamatti . Its plot centers on an earthquake caused by the San Andreas Fault devastating Los Angeles and the San Francisco Bay Area . </P> <P> Principal photography of the film started on April 22, 2014 in Queensland, Australia and wrapped up on July 27 in San Francisco . The film was released worldwide in 2D and 3D on May 29, 2015, received mixed reviews from critics and grossed $473 million worldwide . </P> <P> Raymond "Ray" Gaines is a Los Angeles Fire Department Air Rescue pilot in the midst of a divorce from his wife and planning a trip to San Francisco with his daughter Blake . Meanwhile, Caltech seismologist Dr. Lawrence Hayes and his colleague Dr. Kim Park are at Hoover Dam doing research for a new earthquake predicting model when a nearby and previously unknown fault ruptures . This triggers a 7.1 magnitude earthquake that collapses the dam and kills Park after he rescues a little girl and throws her to Hayes as he falls to the collapsing ground . When Ray is called into work because of this, Blake goes with her mother's new boyfriend Daniel Riddick to San Francisco, instead of Ray . </P> <P> Hayes discovers that the entire San Andreas Fault is shifting and will soon cause a major earthquake, thereby destroying cities along the fault line . Ray's estranged wife Emma is having lunch at a hotel in Downtown LA with Daniel's sister Susan when the fault shifts triggering a 9.1 magnitude earthquake, with Susan among the casualties during the event . Rather than reporting for emergency rescue duty, Ray saves Emma from the collapsing building, and they escape the city aboard his helicopter, barely managing to swerve around the U.S. Bank Tower as it comes crumbling down . </P>

What caused the earthquake in the movie san andreas
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