Available Weekly Reports
24 April-30 April 2013
The Buenos Aires VAAC reported that only gas and steam rose from Antuco on 20 April; although a pilot reported ash emissions, ash was not identified in satellite imagery or by web camera during clear skies.
Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC)
24 April 2013Back to Top
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|[ 1862 Jan ]||[ 1862 Mar 3 ]||Uncertain|
|1861 Feb (?)||1861 Aug (?)||Confirmed||0||Historical|
|1852 Nov||1853 Jan||Confirmed||0||Historical||NE flank fissure and summit|
|[ 1848 ]||[ Unknown ]||Uncertain||2|
|1845 Feb 26||1845 Mar 1 (in or after)||Confirmed||2||Historical|
|[ 1839 ]||[ Unknown ]||Uncertain||2|
|1828 Dec 18||Unknown||Confirmed||2||Historical|
|1806 May (?)||Unknown||Confirmed||2||Historical|
|1752 Jan 31||1752 Feb 1||Confirmed||3||Historical|
|1750 ± 10 years||Unknown||Confirmed||2||Historical|
|7750 BCE (?)||Unknown||Confirmed||Radiocarbon (uncorrected)|
Antuco volcano, constructed to the NE of the Pleistocene Sierra Velluda stratovolcano, rises dramatically above the SW shore of Laguna de la Laja. Antuco has a complicated history beginning with construction of the basaltic-to-andesitic Sierra Veluda and Cerro Condor stratovolcanoes of Pliocene-Pleistocene age. Construction of the Antuco I volcano was followed by edifice failure at the beginning of the Holocene that produced a large debris avalanche which traveled down the Río Laja to the west and left a large 5-km-wide horseshoe-shaped caldera breached to the west. The steep-sided modern basaltic-to-andesitic cone of has grown 1000 m since then; flank fissures and cones have also been active. Moderate explosive eruptions were recorded in the 18th and 19th centuries from both summit and flank vents, and historical lava flows have traveled into the Río Laja drainage.