I felt it here. It felt like a couple waves went under the building. When I overheard other people saying "Did you feel that?", I said "Let's talk about it outside." We went out the door and a couple seconds later the fire alarm went off. They evacuated the building and eventually gave the "all-clear" to return. I just went home since my shift was almost over anyway.
It really felt like being on a boat with a couple waves going underneath.
Back to work now. No harm done to anything but definitely something we're not used to around here.