Along with its neighbor Osorno, Calbuco is one of the most active volcanoes of the southern Chilean Andes.
The isolated late-Pleistocene to Holocene andesitic volcano rises to 2003 m south of Lake Llanquihué in the
Chilean lake district.
Guanahuca, Guenauca, Huanauca, and Huanaque, all listed as synonyms of Calbuco are actually synonyms of nearby
Osorno volcano. The 2003-m-high Calbuco is elongated in a SW-NE direction and is capped by a 400-500 m wide
summit crater. The complex evolution of Calbuco included edifice collapse of an intermediate edifice during the late
Pleistocene that produced a 3 cu km debris avalanche that reached the lake.
One of the largest historical eruptions in southern Chile took place from Calbuco in 1893-1894 and concluded
with lava dome emplacement. Subsequent eruptions have enlarged the lava-dome complex in the summit crater.
Global Volcanism Program
April 23rd 2015
The Calbuco volcano has erupted for the first time in 42 years, sending a huge ash cloud over a sparsely populated,
mountainous area in southern Chile.
A red alert was declared following the sudden eruption at around
18.00 local time (21.00 GMT), which occurred about 1,000km (625 miles)
south of Santiago, the capital, near the tourist towns of Puerto Varas
and Puerto Montt,
An evacuation radius of 20km has been established. As night fell, about 4,000 people had so far moved out of the area.
There are no reports of deaths, missing persons or injuries. Residents
are urged to evacuate and they are warned