...very mild rocking motion. This is big enough to do some, but not too much, damage. Sharks game was affected.
USGS: [link|http://quake.usgs.gov/recenteqs/Maps/122-37.htm|map], [link|http://quake.usgs.gov/recenteqs/Quakes/nc40133364.htm|stats], [link|http://pasadena.wr.usgs.gov/shake/ca/STORE/X40133364/ciim_display.html|shake map]. Light blue is good.
SF Gate: [link|http://www.sfgate.com/cgi-bin/article.cgi?f=/news/archive/2002/05/13/national0116EDT0407.DTL|first report].