An earthquake last night, the second recently, and a good jolt (4.5), though the epicenter was in the East Bay towards Walnut Creek. I happened just as i was dozing off, around 10:30 and I leapt out of bed, grabbed my robe and prepared to flee, if necessary, though it is really hard to decide whether to stay put and let the building collapse under you, or run into the street and get hit by debris. Still, if we had to get out, I needed some clothes. But nothing more happened and I went back to bed.