The San Andres is like a 400 mile long crack the whip, and will probably launch homes 20 feet in the air at the southern end. No joke. I was not far from a quake that caused cars and trucks to bounce up and down completely off the ground in parking lots.
Almost 20 years ago now I was present at a briefing given to public officials in San Bernardino and Riverside regarding the expected effect of a major San Andreas quake upon the Inland Empire. Movement along the fault will be about ten feet up and twenty feet north. Every road, railroad, and utility will be severed.
That’s in addition to the damage done to homes, businesses, freeway, etc. It’ll be a mess, but the older I get the less likely it seems it will be that it will happen in my lifetime.
I remember when the Northridge quake hit in 1994, my friend’s house in Simi Valley had their backyard swimming pool empty all of its water into their living room and move the shell of the pool out of its hole.