Magnitude 7.4 earthquake strikes Mexico, tsunami threat possible for Central America

The coast of southern Mexico was rattled by a powerful earthquake on Tuesday morning that triggered a tsunami alert for Pacific coastlines along Central America. The United States Geological Survey (USGS) said the quake had a preliminary magnitude of 7.4 and struck around 11:29 a.m. ET, 7 miles west of Santa María Zapotitlán, Mexico.-- More...