A bit more fun on this. They took the elevator to get out. But there is a problem with fire alarms, and there should be an earthquake override. I'm thinking they need an automatic system attached to the public address system - "We have experienced a moderate earthquake. Please stay at your workplace until told to leave." I would set that at a PGV of 1 cm/s, which is what they probably experienced.
Of course, at 10 cm/s, there might just be a 'duck and cover' alarm. :)