Nevados de Chillán

Volcán Viejo was the main active vent during the 17th-19th centuries, and the new Volcán Nuevo lava dome complex formed between 1906 and 1945, eventually growing to exceed Viejo in height by the mid 1980s.

This complex contains two subcomplexes: Cerro Blanco and Las Termas.

The subcomplex Cerro Blanco includes the volcanoes Santa Gertrudis, Gato, Cerro Blanco, Colcura, Calfú Pichicalfú and Baños.

The subcomplex Las Termas includes the volcanoes Shangri-La, Nuevo, Arrau, Viejo, Chillán y Pata de Perro.

In addition, near of the complex there are two pyroclastic satellite cones, the volcanoes Las Lagunillas and Parador.

Aerial view of the Nevados de Chillán chain. Left to right: Volcán Nevado, Volcán Nuevo, Volcán Chillán. The Volcán Arrau dome complex (1973–1986) can be seen as a sharp cone-shape in front of the Volcán Nevado.