No latest activity reported for Azul, Cerro.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Casertano L, 1963a. Chilean Continent. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 15: 1-55

Gonzalez-Ferran O, 1972. Distribucion del volcanismo activo de Chile y la reciente erupcion del Volcan Villarrica. {Instituto Geog Militar Chile}, O/T 3491

Gonzalez-Ferran O, 1995. {Volcanes de Chile}. Santiago: Instituto Geografico Militar, 635 p

Hildreth W, Drake R E, 1992. Volcan Quizapu, Chilean Andes. {Bull Volc}, 54: 93-125

The Cerro Azul stratovolcano is at the southern end of the Descabezado Grande-Cerro Azul eruptive system. Steep-sided 3788-m-high Cerro Azul has a 500-m-wide summit crater that is open to the north. The three basaltic-andesite "La Resoloma Craters" scoria vents are located below the west flank and the two "Los Hornitos" scoria cones on the lower SW flank. Quizapu, a major vent on the northern flank of Cerro Azul, formed in 1846 during the first historical eruption at Cerro Azul, accompanied by the emission of voluminous dacitic lava flows that traveled both east into the Estero Barroso valley and west into the Río Blanquillo valley. Quizapu was later the source of one of the world's largest explosive eruptions of the 20th century in 1932, which created a 600-700 m wide, 150-m-deep crater and ejected 9.5 cu km of dacitic tephra.