http://www.data.scec.org/recenteqs.html
An interesting site...
http://www.poynter.org/column.asp?id=49&aid=76250#List
http://neic.usgs.gov/neis/eqlists/eqstats.html
http://neic.usgs.gov/neis/eqlists/info_1990s.html
http://neic.usgs.gov/neis/eqlists/graphs.html