Friday, 30 October 2015

Eruption on Mount Lascar, northern Chile.

The Servicio Nacional de Geología y Minería reported a small eruption on Mount Lascar, an active volcano in the northern Chilean Andes in the Antofagasta Region of Chile, occurring slightly after 9.30 am on Friday 30 October 2015. The eruption produced a plume which rose about 2.5 km above the summit of the volcano (which is 5592 m above sea-level) and drifted to the northeast. This is the first eruption on Mount Lascar since November 2013.

Eruption on Mount Lascar on 30 October 2015. Servicio Nacional de Geología y Minería.

Lascar comprises a group of six overlapping craters on a site that has been active since at least the Late Pleistocene. The largest eruption at the site is thought to have occurred about 26 500 years ago. Most modern eruptions are comparatively small, though an eruption in 1993 caused a pyroclastic flow that reached 8.5 km from the caldera and ashfalls in Buenos Aires. 

The approximate location of Mount Lascar. Google Maps.

Like other volcanoes in the Andes, Lascar is fed by the subduction of the Nazca Plate beneath the South American Place along the west coast of the continent. As the Nazca Plate sinks into the Earth it passes under South America, and at the same time is partially melted by the heat and pressure of the planet's interior. More volatile elements in the melted magma to rise up through the overlying South American Plate, fueling the volcanoes of the Andes.

The subduction of the Nazca Plate beneath the South American Plate, and how it causes Earthquakes and volcanoes. Pacific Earthquake Engineering Research Center.

See also...

The Buenos Aires Volcanic Ash Advisory Center reported plume over Mount Copahue, an active volcano on the border between Chile and Argentina roughly 500 km to the south of the Chilean capitol Santiago, on Sunday 11 October 2015. The plume rose 6.1-7.6 km over the volcano, and drifted to...


Fourteen people have now been confirmed dead following an Earthquake off the west coast of Chile on Wednesday 16 September 2015. The event...

Authorities in Chile have began to evacuate homes within 20 km of Mount Calbuco, a volcano in the Los Lagos Region in the south of the country, after the volcano began to erupt at about 6.00 pm local time...


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