When the first quake happened, I did run. But it didn't really occur to me that we'd had an earthquake until after. It was like I was auto responding to an emergency, but the mind hadn't had time to process that it was an earthquake.
And, this is considering the fact that we'd sort of known that a big one was due soonish.
It should contain all your valuable documents, medication if you need it, first-aid kit, spare water bottles, emergency food and water for 5 days, backup cell device, etc.
Nobody living in a quake zone should be content with themselves unless they have a proper bug-out bag prepared .. you don't want to be fighting for scraps in SoCal after a big quake.
(I once watched two little old ladies - grandma's - beat the shit out of each other in a 711, fighting over the last bottle of water on the shelf..)
https://www.fema.gov/media-library-data/20130726-1728-25045-...
It's like what happens to thunder when it's far away.