Wikipedia article of the day for September 16, 2025

The Wikipedia article of the day for September 16, 2025 is Socompa.
Socompa is a large stratovolcano (composite volcano) on the border of Argentina and Chile. It has an elevation of 6,051 metres (19,852 ft) and is part of the Chilean and Argentine Andean Volcanic Belt. Socompa lies close to the pass of the same name where the Salta–Antofagasta railway crosses the border. Most of the northwestern slope of Socompa collapsed catastrophically 7,200 years ago to form an extensive debris avalanche deposit. The Socompa collapse is among the largest known on land with a volume of 19.2 cubic kilometres (4.6 cu mi) and a surface area of 490 square kilometres (190 sq mi). After the volcanic landslide, Socompa was rebuilt by the effusion of lava flows and much of the scar is now filled in. Socompa is also noteworthy for the high-altitude biotic communities that are bound to fumaroles on the mountain. They are well above the sparse regular vegetation in the region, which does not extend up the mountains. The climate on the mountain is cold and dry.