I'm a geologist, so I love finding faults in California. It is easy.
Geology is a science of recognizing the obvious. You look around and see what is there. The land and the rocks tell you a story and they are not subtle.
In California, if you look at a topographic map and see a linear feature (a straight stream bed, a line of hills, etc) it's a fault. It may not be mapped as a fault (yet), but it is a fault. Few natural things beyond fractures in the earth, portray themselves as straight lines in topography.
Why am I bringing this up? Well, the Northridge earthquake in 1994 showed us that devastating earthquakes occur on unmapped faults. California is shattered with thousands of unmapped faults.
Our politicians have devised a method for determining earthquake hazards for home buyers. But, our politicians don't understand geology.
Personally, I don't live the foothills. I will remain a devout flatlander until after the next big quake.
6:47:56 PM 
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