[Insert song title with the word "shake" in it here.]

The scientists are weighing in, trying to calm fears about the Big One.

HAYWARD FAULT / 3 recent temblors are usual activity.

"These three quakes are minor occurrences," said David Schwartz, a USGS geologist. "The fact they occurred within four days has to be looked at as random and coincidental." The quakes occurred in what experts called a "pocket" of the Hayward Fault that is prone to quakes. Although it is somewhat unusual to see three quakes in such quick succession, they said, it is not unheard of.

I've lived in San Francisco for over three years, and I've felt four quakes--three in the last week. Now, I can recognize the difference between an earthquake and someone slamming a door in my building.