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Friday, Feb 17, 2017
Increased seismic activity triggered SERNAGEOMIN to raise the alert status of the volcano to yellow. ... [more]
 

Lanin volcano

stratovolcano 3747 m / 12,293 ft
Central Chile and Argentina, South America, -39.63°S / -71.5°W
Current status: normal or dormant (1 out of 5) | Reports
Lanin volcano books
Last update: 17 Feb 2017 (seismic unrest)
Typical eruption style: explosive
Lanin volcano eruptions: 560 AD ± 150, 400 AD ± 150, 90 AD ± 300, 80 BC ± 200, 220 BC ± 200, 590 BC ± 200, 6340 BC ± 200, 9240 BC ± 500 years (radiocarbon dated)
TimeMag. / DepthDistanceLocation
Mon, 26 Nov
Mon, 26 Nov 14:12 UTCM 4.5 / 160.6 km4 km36 km al NO de San Martín de Los Andes
Lanín is a large, conical and active (but at present dormant) stratovolcano on the Chile-Argentina border, located approximately 45 km southeast of Villarrica volcano.
The volcano is mostly basaltic and andesitic in composition and many eruptions came from flank vents.
The most recent eruption took place about 2200 years ago and produced a small lava dome at the summit and a block lava flow to the north.

Background:

The volcano lies at the eastern end of a transverse to the Andean chain NW-SE-trending group of volcanoes starting at Villarrica volcano in the NW.
The symmetrical cone of the 3737-m-high Lanín edifice rises 2500 m above its base. Shoulder areas on the upper flanks suggest that the cone has grown over a now buried caldera.
The volcano was formed in 4 eruptive stages dating back at least 200,000 years. The last 2 stages occurred in the past 10,000 years and the volcano has only dormant at present.
There are uncertain reports of activity after an earthquake in 1906, but these reports are likely to be false. A less than 10,000 years old tuff ring (Volcán Arenal) is located below the SW flank of Lanín in Argentina. A younger lava flow from Lanín extends south into Lago Paimún in Argentina.


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