Original: The name Popocatépetl comes from the Nahuatl words ` it smokes ' and ` mountain ' , thus Smoking Mountain ; the name Don Goyo comes from the mountain 's association in the lore of the region with San Gregorio ( St. Gregory ) , '' Goyo '' being a nickname-like short form of Gregorio .
Simplified: On December 21 , 1994 the volcano threw out gas and ash which was carried as far as 25 km away by the wind .