Osorno

Google Earth Placemark
  • Country
  • Subregion Name
  • Volcano Type
  • Last Known Eruption
  • 2652 m
    8699 ft
  • -41.100°
  • -72.493°
  • Elevation
  •  
  • Latitude
  • Longitude

There are no activity reports for Osorno.



 Available Weekly Reports


There are no Weekly Reports available for Osorno.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1869 Unknown Confirmed 2 Historical
1855 Unknown Confirmed 2 Historical
[ 1852 ] [ Unknown ] Discredited    
1851 Unknown Confirmed 2 Historical
1837 Nov 7 Unknown Confirmed 2 Historical
1834 Nov 29 1835 Feb 24 ± 4 days Confirmed 3 Historical Summit & SSW side (Negrillar de Ensenada)
1790 Mar 9 1791 Dec 26 ± 5 days Confirmed 2 Historical SE base
1765 ± 14 years Unknown Confirmed 1 Historical
1719 Unknown Confirmed 2 Historical
1644 Unknown Confirmed 2 Historical
1640 Unknown Confirmed 2 Historical
1575 Unknown Confirmed 2 Historical
1310 ± 75 years Unknown Confirmed   Radiocarbon (uncorrected)
1220 ± 100 years Unknown Confirmed   Radiocarbon (uncorrected)
910 ± 100 years Unknown Confirmed   Radiocarbon (uncorrected)
420 ± 100 years Unknown Confirmed 4 Radiocarbon (uncorrected)
210 BCE ± 75 years Unknown Confirmed   Radiocarbon (uncorrected)
1710 BCE ± 75 years Unknown Confirmed   Radiocarbon (uncorrected)

The symmetrical, glacier-clad Osorno volcano forms a renowned landmark that towers over Todos los Santos and Llanquihué lakes. Osorno was constructed over a roughly 250,000-year-old eroded stratovolcano, La Picada, that has a mostly buried 6-km-wide caldera. La Picada underlies Osorno on the NE and has postglacial maars and scoria cones. The 2652-m-high dominantly basaltic to basaltic-andesite Osorno is one of the most active volcanoes of the southern Chilean Andes. The conical volcano contains two small dacitic lava domes on the NW and SSE flanks. Flank scoria cones and fissure vents, primarily on the west and SW sides, have produced lava flows that reached Lago Llanquihué. Frequent explosive eruptions including pyroclastic flows and surges have occurred during the past 14,000 years. Historical eruptions at Osorno have originated from both summit and flank vents and have produced basaltic and andesitic lava flows that have entered both Llanquihué and Todos los Santos lakes.