The quake was felt as far north as San Francisco and Santa Ana (though SFist must confess we were so engrossed in Wonkette this morning that we didn't notice a thing), and it shook up the South Bay enough that the Scott Peterson trial went briefly into recess.
A 5.9 to 6.0 earthquake can damage chimneys, move heavy furniture, stop pendulum clocks, and cause plaster to fall off your walls. The magnitude chart laconically states that such a quake is "felt by all, many frightened." (...and yikes! Check out quakes rated "XII": "Damage total. Lines of sight and level are distorted. Objects thrown into the air.")