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Context

• Colombian authorities plan to evacuate people living within 15 kilometers of the Nevado del Ruiz volcano, which is being monitored for a possible eruption.

Details

• Nevado del Ruiz is a volcano on the border of the departments of Caldas and Tolima in Colombia.
• It is about 129 km west of the capital city Bogotá.
• It is a stratovolcano composed of many layers of lava alternating with hardened volcanic ash and other pyroclastic rocks.
• The volcano usually generates Vulcanian to Plinian eruptions, which produce swift-moving currents of hot gas and rock called pyroclastic flows.
• The volcano is part of Los Nevados National Natural Park, which also contains several other volcanoes.
• Nevado del Ruiz lies within the Pacific Ring of Fire, a region that encircles the Pacific Ocean and contains some of the world's most active volcanoes.
• It lies in the North Volcanic Zone of the Andean Volcanic Belt.

Note: The Andean Volcanic Belt is produced by the eastward subduction of the oceanic Nazca Plate beneath the South American continental plate.

TYPES OF VOLCANOES: https://www.iasgyan.in/blogs/types-of-volcano

Andes

• The  Andean Mountain Range are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. 
• The Andes extend from north to south through seven South American countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina.
• The Andes Mountains are the highest mountain range outside Asia. The highest mountain outside Asia, Argentina's Mount Aconcagua, rises to an elevation of about 6,961 m above sea level.
• The world's highest volcanoes in the Andes, including Ojos del Salado on the Chile-Argentina border.

https://www.reuters.com/world/americas/colombia-evacuate-those-closest-nevado-del-ruiz-volcano-2023-04-04/

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