Hm, for most buildings, stepping outside is one of the most dangerous things you can do during an earthquake. It's common for bricks, shards of glass, large tree branches, power lines, and all kinds of things to come crashing to the ground in the immediate vicinity of buildings.

If you are inside, stay inside and get under a sturdy piece of furniture, such as your office desk. If you are outside, run the hell away from structures and trees toward the most open space you can get to.