I JUST FELT MY FIRST EARTHQUAKE EVAH!!!!!!!!! Okay so I was in a 5.7 what, a few months ago? And didn't feel it...This one was only a 4.1 but I felt it! I'm up at Berkeley talking to Mike on my phone listening to the Dave Matthews Band concert going on practically outside my window, when suddenly my bed starts to shake! I'm like, "What the heck?!" and I sit up and see that the chain lock hanging from my door is swinging. I went to the EQ site but there was nothing there for a few minutes. I kept refreshing until it popped up. The epicenter was SE of here, E of Oakland.
http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/nc51207740.php I guess that's the difference a building's structure makes...if I couldn't feel a 5.7 in the Geology building's bathroom, but I could feel a 4.1 at the Women's Faculty Center at Cal!