Southern Andean Volcano Observatory
The Southern Andean Volcano Observatory, also known by its acronyms as OVDAS, is part of Red Nacional de Vigilancia Volcánica, a program of the Chilean National Geology and Mining Service to watch the 43 most dangerous volcanoes of Chile. 2012 there were 30 volcanos under observation.
This is a list of the volcanoes with activity reports made by the OVDAS.
| Name | Last eruption | Region | Coordinates | OVDAS webpage |
| Isluga | 96000±6000 years BP | Tarapacá | ||
| San Pedro | 1960 | Antofagasta | ||
| Lascar | 1993 | Antofagasta | ||
| Tupungatito | 1959-60 | Metropolitana | ||
| San José | 1932-33 | Metropolitana | ||
| Tinguiririca | 1917 | O'Higgins | ||
| Planchón-Peteroa | 2010 | Maule | ||
| Descabezado G. | 1932-33 | Maule | ||
| San Pedro de Tarara | 96000±6000 years BP | Maule | ||
| Nevado de Longaví | Holocene | Maule | ||
| Laguna del Maule | 3000 years BP | Maule | ||
| Nevados de Chillán | 1973 | Biobío | ||
| Antuco | 1853 | Maule | ||
| Copahue | 1992 | Biobío | ||
| Callaqui | 1980 | Biobío | ||
| Lonquimay and Tolhuaca | 1990 | Araucanía | ||
| Llaima | 2009 | Araucanía | ||
| Sollipulli | 1240 A.D. | Araucanía | ||
| Villarrica | 2010 | Araucanía, Los Ríos | ||
| Quetrupillán | 1650±70 BP | Araucanía, Los Ríos | ||
| Lanín | 2170±70 years BP | Araucanía, Los Ríos | ||
| Mocho-Choshuenco | 1864 | Los Ríos | ||
| Carrán-Los Venados | 1955 AD | Los Ríos | ||
| Puyehue-Cordón Caulle | 2011 | Los Ríos, Los Lagos | ||
| Antillanca-Casablanca | 2910 ± 150 years BP | Los Lagos | ||
| Osorno | 1869 | Los Lagos | ||
| Calbuco | 2015 | Los Lagos | ||
| Yate and Hornopirén | ? | Los Lagos | ||
| Michinmahuida | 17th century? | Los Lagos | ||
| Chaitén | 2008 | Los Lagos | ||
| Corcovado and Yanteles | 6870±90 BP | Los Lagos | ||
| Macá | 9000 years BP | Aysén | ||
| Melimoyu | 200 AD ± 75 years | Aysén | ||
| Mentolat | 1850? | Aysén | ||
| Hudson | 1991 | Aysén |
image:Llaima eruption1.jpg|240px|thumb|right|Llaima's 2008 eruption as viewed from Temuco
The headquarters are at Cerro Ñielol at Temuco from where there is good sight to Llaima and Villarrica, two of Chile's most active volcanoes. Much of the OVDAS work is made in collaboration with CONAF that administers the national parks and reserves where many volcanoes are located. The regional government of Araucanía Region also contributed to the project.