Steve,
I can't imagine a 8.6 earthquake. That has to be an indelible memory.
I was living in the 2nd floor barracks in Pt Hueneme, CA while attending a Navy A-School when the 6.6 San Fernando earthquake happened of Feb. 9, 1971. I was laying in bed reading and the bed started walking across the floor. Pt Hueneme was about 50 miles from the epicenter. It really scared the hell out of me.
Also I believe the Richter scale is logaritmic so a 8.6 earthquake is 100 times more powerful than a 6.6 earthquake.
Alan