Chillan, Nevados de (Chile)

Status Eruption Eruption 2019 3180m
Stratovolcano (Subduction zone / Continental crust (> 25 km))

Chillan, Nevados de

The compound volcano of Nevados de Chillán is one of the most active of the Central Andes. Three late-Pleistocene to Holocene stratovolcanoes were constructed along a NNW-SSE line within three nested Pleistocene calderas, which produced ignimbrite sheets extending more than 100 km into the Central Depression of Chile. The largest stratovolcano, dominantly andesitic, Cerro Blanco (Volcán Nevado), is located at the NW end of the group. Volcán Viejo (Volcán Chillán), which was the main active vent during the 17th-19th centuries, occupies the SE end. The new Volcán Nuevo lava-dome complex formed between 1906 and 1945 between the two volcanoes and grew to exceed Volcán Viejo in elevation. The Volcán Arrau dome complex was constructed SE of Volcán Nuevo between 1973 and 1986 and eventually exceeded its height.

Volcán Nuevo, the newest cone of the three-peaked Nevados de Chillán volcano, was formed beginning in 1861. It grew between Cerro Blanco and Volcán Viejo, which anchor the NW and SE ends of the complex, respectively. Volcán Nuevo has been the most active volcano of the complex since its birth. In 1973, the year of this photo, a long-term eruption began on the SE flank of Volcán Nuevo, producing a cone that by 1987 had grown above Volcán Nuevo. Nevados de Chillán is one of the most active volcanoes of the Central Andes of Chile.

Photo by Hugo Moreno, 1973 (University of Chile).

Last updated 2019-12-10 09:30:04

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INTERMITTENT EMISSION

Buenos Aires VAAC - 2019-12-10 09:16:00 UTC ()

VA NOT IDENTIFIABLE FM STLT DATA

Buenos Aires VAAC - 2019-12-10 04:48:00 UTC ()

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Buenos Aires VAAC - 2019-12-09 22:48:00 UTC ()

SPORADIC PULSES OF VA

Buenos Aires VAAC - 2019-12-09 16:51:00 UTC ()

SPORADIC PULSES OF VA

Buenos Aires VAAC - 2019-12-09 10:50:00 UTC ()

SPORADIC PULSES OF VA

Buenos Aires VAAC - 2019-12-09 04:55:00 UTC ()

INTERMITTENT PULSES OF VA

Buenos Aires VAAC - 2019-12-08 23:29:00 UTC ()

INTERMITTENT EMISSIONS

Buenos Aires VAAC - 2019-12-08 17:35:00 UTC ()

INTERMITTENT VA EMISSION

Buenos Aires VAAC - 2019-12-08 11:31:00 UTC ()

INTERMITTENT VA EMISSION

Buenos Aires VAAC - 2019-12-08 05:48:00 UTC ()