The not-so-Big One

Just felt my first major earthquake: a 5.6 near Los Angeles (Chino Hills to be exact). I work across the street from an air base and a truck yard so I’m used to the building rumbling when a low flying fighter jet or heavy semi truck goes by but this was a good 10-15 seconds of the building undulating. Weird!!! My coworker in Pasadena said a bunch of stuff fell off the walls/shelves in his office as he bolted out the door; at least he’s OK!