Not the Civil War -- World War Two. Although more American died in the Civil War, more Americans were killed in WW2. It's a pedantic technicality perhaps, but the Civil War was America's deadliest war, World War II its bloodiest.
The San Andreas Fault is the transform boundary between the North American Plate and the Pacific Plate. During the 1906 San Francisco earthquake the northern section of the San Andreas Fault slipped northward along the fault from San Juan Bautista to Cape Mendocino, a total of 296 miles (477km).
There are transform faults which the earth crust rubs past each other. Mid ocean ridges and rift valleys which divergence takes place, and deep ocean trenches where convergence takes place. The biggest earthquakes happen at subduction zones though. An earthquake is caused by a sudden slip on a fault.