When did Aconcagua last erupt?

Aconcagua is not classified as a volcano and has no recorded historical evidence of eruptions. The mountain was formed by colliding plate movements, not through the build up of rocks released from a volcanic fissure.

Aconcagua is the tallest mountain in the western hemisphere, measuring 22,837 feet tall. It is located 70 miles from the capital city of Mendoza, Argentina, near the Chilean border. It is one of the Seven Summits, a group of mountains considered to be mountaineering challenges. The first recorded successful climb to the summit was completed by a British climber in 1897 after an unsuccessful attempt in 1883.