Original: On November 13, 1985, a small eruption produced an enormous lahar that buried and desolated the town of Armero in Tolima Department, causing an estimated 23,000 deaths. This event later became known as the Armero tragedyâ "the deadliest lahar in recorded history.
Simplified: About 23,000 people died when the lahar covered the Armero, making this the most deadly lahar in the history of the world.