Villarrica Volcano - John Seach

john

Central Chile

39.42 S, 71.93 W
summit elevation 2847 m
stratovolcano

Villarrica volcano is located in the lakes district of Chile, about 650 km south of Santiago. Villarrica is one of Chile's most active volcanoes.

The volcano is located in the Andes mountains, and is tectonically associated with east-dipping subduction of the Nazca plate beneath the South American plate. Villarrica has been triggered 5 times to erupt after a large earthquake.

Villarrica is composed of pyroclastic flow and scoria deposits as well as aa and pahoehoe lavas. The symmetrical, modern cone is located on the NW rim of a glaciated 6.5 x 4.2 km caldera. Postglacial eruptions at Villarrica included both explosive and effusive activity. At least 14 explosive eruptions have produced pyroclastic flows. Two of these eruptions formed calderas.

Convection of magma in the volcanic conduit with 5 m diameter is an hypothesised mechanism for transporting both the volatiles and heat to produce the observed gas emissions and prevent the lava lake from solidifying.

2015 Eruption
A large eruption occurred at Villarrica volcano on 3 March 2015. The eruption was explosive and included a large lava fountain, ash emissions 30,000 ft altitude and lava flows.

2010 Eruption
A lava lake was present in the crater of Villarrica volcano in May 2010. On 10th May the lava lake was 100 m below the crater rim.

2008 Update
On 26th October 2008 a dark ash emission occurred from the summit crater. The plume deposited a thin layer of tephra several kilometers long on the east flank.

1985-2001 Lava Lake
The volcano contained a long active lava lake in the summit crater from 1985 until 2001.

1984-85 Eruptions
The last significant explosive eruption occurred between October 1984 and January 1985. It produced a small scoria cone in the summit crater and lava burrowed through glaciers on the flanks, and creating lahars in downstream valleys.

Villarrica Volcano Eruptions

2015, 2010, 2008, 2005, 1985-2001 (lava lake), 1984-85, 1983, 1980, 1977, 1971-72, 1964, 1963, ?1960-61, 1958-59, 1950?, 1948-49, 1938, 1935, 1933, 1929, 1921, 1920-29, 1919?, 1915-18?, 1910?, 1909, 1908, 1907, 1906, 1904, 1897-98?, 1893-94?, 1883, 1879, 1877, 1875-76, 1874, 1869?, 1867-68, 1864, 1859-60, 1853, 1852?, 1837, 1832, 1822, 1815-18, 1806, 1801, 1799, 1796, 1792, 1790, 1787, 1780, 1777, 1759, 1751, 1745, 1742, 1737, 1716, 1688, 1657?, 1647?, 1640, 1594, 1562, 1558.