According to the scientists at the United States Geographical Survey, three major fault lines run beneath Lake Tahoe. The West Tahoe Fault is the largest of the three and defines the West Shore of the lake while the Incline Village and Stateline faults run through Incline and into the Lake. Last Sunday, Tahoe experienced a 3.9 magnitude earthquake. The earthquake hit nearly dead center in the middle of Tahoe and was felt by thousands. Did you feel it?!