 Volcán de Colima, south of Guadalajara, erupted in 1994, and El Chichón, in southern Mexico, underwent a violent eruption in 1983.Parícutin in northwest Mexico began as puffs of smoke in a cornfield in 1943; a decade later the volcano was 424 meters high.Although dormant for decades, Popocatépetl and Iztaccíhuatl ("smoking warrior" and "white lady," respectively, in Nahuatl) occasionally send out puffs of smoke clearly visible in Mexico City, a reminder to the capital's inhabitants that volcanic activity is near.