Volcán Santiaguito. Quetzaltenango, Guatemala. by guido velasquez Is a large active volcano. Prior to the Spanish Conquest it was called Gagxanul in the local K'iche' language. Its eruption in 1902 was one of the four largest eruptions of the 20th century, after the 1912 Novarupta and 1991 Pinatubo eruptions. It is also one of the five biggest eruptions of the past 200 (and probably 300) years.