Lock any wheelchair wheels. If seated, bend over your knees. If you must stand, lean into the wall. Cover your head with your hands or arms. It may be noisy.
Earthquakes can make doors slam open and shut and tip over office files and bookcases.
They can start fire alarms. Items hung on the wall may drop. Ceiling panels and light fixtures may fall. Flimsy partitions may fall over. Windows and mirrors may shatter.