President Vicente Foxdeclared a state of emergency today in Colima, a coastal state hit overnight by apowerful earthquake that rolled across central Mexico from the Pacific Ocean, killing at least 29 people and rattling millions of Mexico City residentsIt took only minutes on Saturday June 23rd for a powerful 8.1 earthquake to rip through southernPeruExperts with the China Earthquake Networks Center said strong aftershocks may still rock Wenchuan, though quakes exceeding 7.8 on the Richter scale are unlikelyWhen he was working on Monday afternoon, Tan said hesuddenlyfelt the ground was shaking.