Well, we just had a magnitude 3.4 earthquake centered only about half a mile away. It's not the biggest earthquake since we've been living here - there was a 5.2 a bit further away last year - but because it was so close, it felt much more intense. There was probably 10 seconds or rough shaking, compared to 3 or 4 seconds of rolling in the 5.2, just long enough to be scary, especially for the dog.
My first instinct in an earthquake is not to get outside or check for damage. Oh no: it's to go the USGS web site to see where it was and how powerful. And I'm not alone, as several people on the neighborhood mailing list and on local blogs have already posted links to the report: http://quake.usgs.gov/recenteqs/Quakes/ci10373093.htm.