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Study shows massive California-wide earthquake not unlikely




 Research Geophysicist with the United States Geological Survey (USGS), Brad Aagaard, shows members of the media a series of images that illustrate how shock waves from an expected catastrophic 7.8 magnitude earthquake on the San Andreas Fault would likely fan out across southern California.
Research Geophysicist with the United States Geological Survey (USGS), Brad Aagaard, shows members of the media a series of images that illustrate how shock waves from an expected catastrophic 7.8 magnitude earthquake on the San Andreas Fault would likely fan out across southern California.
David McNew/Getty Images

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For a long time geologists believed it was unlikely that a massive quake in say, San Diego could reach all the way to San Francisco.

But a new study published by the journal Nature says that kind of mega-quake isn't out of the question.

Here to explain is Kate Hutton, a seismologist with the California Institute of Technology.