For example, the
1989 7.0m Loma Prieta earthquake - I was in my Apple office (cubicle) in Valley Green 3 when it hit at 17:04 PDT - a mere 10 miles from the epicenter.
That quake substantially shut down Apple's HQ operations in Cupertino for three days while its buildings were safety-inspected. It also took "apple.com" off the Internet until I was able to re-enter Mariani 1 and get things up again. Apple's product manufacturing operations in Fremont (much further away from the quake epicenter) were down for a day.
The
Infinite Loop campus was built afterward, on a lot & facility that Motorola had owned before the earthquake.