Southern Andean Volcano Observatory

The Southern Andean Volcano Observatory (Spanish: Observatorio Volcanológico de los Andes del Sur), 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
Isluga	96000±6000 years BP	Tarapacá	19°07′S 68°49′W / 19.117°S 68.817°W / -19.117; -68.817
San Pedro	1960	Antofagasta	21°53′S 68°24′W / 21.883°S 68.400°W / -21.883; -68.400
Lascar	1993	Antofagasta	23°22′S 67°54′W / 23.367°S 67.900°W / -23.367; -67.900
Tupungatito	1959-60	Metropolitana	33°23′S 69°48′W / 33.383°S 69.800°W / -33.383; -69.800
San José	1932-33	Metropolitana	33°47′S 69°53′W / 33.783°S 69.883°W / -33.783; -69.883
Tinguiririca	1917	O'Higgins	34°49′S 70°20′W / 34.817°S 70.333°W / -34.817; -70.333
Planchón-Peteroa	2010	Maule	35°14′S 70°34′W / 35.233°S 70.567°W / -35.233; -70.567
Descabezado G.	1932-33	Maule	35°35′S 70°44′W / 35.583°S 70.733°W / -35.583; -70.733
San Pedro de Tarara	96000±6000 years BP	Maule	36°00′S 71°50′W / 36.000°S 71.833°W / -36.000; -71.833
Nevado de Longaví	Holocene	Maule	36°12′S 71°10′W / 36.200°S 71.167°W / -36.200; -71.167
Laguna del Maule	3000 years BP	Maule	36°59′S 70°35′W / 36.983°S 70.583°W / -36.983; -70.583
Nevados de Chillán	1973	Biobío	36°51′S 71°24′W / 36.850°S 71.400°W / -36.850; -71.400
Antuco	1853	Maule	37°24′S 71°21′W / 37.400°S 71.350°W / -37.400; -71.350
Copahue	1992	Biobío	37°52′S 71°10′W / 37.867°S 71.167°W / -37.867; -71.167
Callaqui	1980	Biobío	37°55′S 71°27′W / 37.92°S 71.45°W / -37.92; -71.45
Lonquimay and Tolhuaca	1990	Araucanía	38°23′S 71°35′W / 38.383°S 71.583°W / -38.383; -71.583
Llaima	2009	Araucanía	38°41′S 71°44′W / 38.683°S 71.733°W / -38.683; -71.733
Sollipulli	1240 A.D.	Araucanía	38°59′S 71°31′W / 38.983°S 71.517°W / -38.983; -71.517
Villarrica	2010	Araucanía, Los Ríos	39°25′S 71°56′W / 39.42°S 71.93°W / -39.42; -71.93
Quetrupillán	1650±70 BP	Araucanía, Los Ríos	39°30′S 71°42′W / 39.5°S 71.7°W / -39.5; -71.7
Lanín	2170±70 years BP	Araucanía, Los Ríos	39°42′S 71°30′W / 39.7°S 71.5°W / -39.7; -71.5
Mocho-Choshuenco	1864	Los Ríos	39°55′S 72°02′W / 39.917°S 72.033°W / -39.917; -72.033
Carrán-Los Venados	1955 AD	Los Ríos	40°21′S 72°04′W / 40.35°S 72.07°W / -40.35; -72.07
Puyehue-Cordón Caulle	2011	Los Ríos, Los Lagos	40°31′S 72°12′W / 40.517°S 72.200°W / -40.517; -72.200
Antillanca-Casablanca	2910 ± 150 years BP	Los Lagos	40°46′S 72°13′W / 40.77°S 72.22°W / -40.77; -72.22
Osorno	1869	Los Lagos	41°06′S 72°30′W / 41.100°S 72.500°W / -41.100; -72.500
Calbuco	2015	Los Lagos	41°19′S 72°36′W / 41.32°S 72.60°W / -41.32; -72.60
Yate and Hornopirén	?	Los Lagos	41°46′S 72°24′W / 41.767°S 72.400°W / -41.767; -72.400
Michinmahuida	17th century?	Los Lagos	42°48′S 72°26′W / 42.800°S 72.433°W / -42.800; -72.433
Chaitén	2008	Los Lagos	42°50′S 72°39′W / 42.833°S 72.650°W / -42.833; -72.650
Corcovado and Yanteles	6870±90 BP	Los Lagos	43°11′S 72°47′W / 43.183°S 72.783°W / -43.183; -72.783
Macá	9000 years BP	Aysén	45°06′S 73°10′W / 45.100°S 73.167°W / -45.100; -73.167
Melimoyu	200 AD ± 75 years	Aysén	44°05′S 72°53′W / 44.083°S 72.883°W / -44.083; -72.883
Mentolat	1850?	Aysén	44°42′S 73°05′W / 44.70°S 73.08°W / -44.70; -73.08
Hudson	1991	Aysén	45°54′S 72°58′W / 45.900°S 72.967°W / -45.900; -72.967

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.