The U.S. Geological Survey said the quake struck at 11:49 p.m. Thursday local time and its epicenter was 102 miles west of Tapachula in southern Chiapas state not far from Guatemala. … The U.S. Tsunami Warning System said hazardous tsunami waves were possible on the Pacific coasts of several Central American countries, including Guatemala, El Salvador, Costa Rica, Nicaragua, Panama and Honduras, within three hours. There was no tsunami threat for the U.S. West Coast, but the warning system said waves could reach Mexico and as far as Ecuador.