Rock Doc

I once experienced a small earthquake when I was visiting the San Francisco Bay area in California. The natives thought little of the temblor but I was impressed that the ground beneath my feet could suddenly and without warning start to shake.

Later, when I majored in geology in college, I learned that my native Northwest is also at risk for earthquakes, as is much of Alaska. Another part of the country with a history of large quakes is called the New Madrid Seismic Zone. It's a pretty large region centered near where the states of Arkansas, Missouri, Illinois, Tennessee and Kentucky come tog...