Geothermal Production in the Imperial Valley has increased activities around the San Andreas Fault.
The San Andreas fault runs hundreds of miles, from high mountains to low deserts. It passes through dozens of California's communities, and, according to scientists, a large earthquake could be imminent.
But that earthquake, commonly known as the Big One, could actually be a series of powerful shakes.
Author John Dvorak goes back more than 100 years to explore the San Andreas fault in new book, "Earthquake Storms: The Fascinating History and Volatile Future of the San Andreas Fault."