Why a 6.1 quake isn't that powerful

[NewsWhore]

A magnitude 6.1 aftershock struck near Port-au-Prince on Wednesday morning. With so many buildings damaged by the major Haiti earthquake last week, there are concerns about danger. But there's a world...

More... (http://story.haitisun.com/index.php/ct/9/cid/8d0a8b42a4163d9f/id/31489872/)