Magnitude 4.3 Earthquake Shakes San Jose, Silicon Valley
Or at least my house--I felt a definite swaying for about ten seconds while this rolled through about 40 minutes ago, but it quickly dissipated. Others here at the opposite end of the house literally felt nothing. "People in downtown San Jose said it felt like a jolt in high rise buildings with blinds shaking back and forth", according to the local NBC affiliate.
This is as good a time as any to reprint Virginia Postrel's great "Resilience vs. Anticipation" essay from 1997, on how weather can impact business development. Of course, it was written in a time when markets weren't being shook by outside force themselves.