Notable historic volcanic eruptions include the eruption of Nevado del Ruiz on November 13, 1985, which produced the deadliest lahar in history. Over 22,000 people lost their lives in the lahar. A lahar is a landslide or mudflow of pyroclastic material on the flank of a volcano or a deposit produced by such a landslide. Lahars are described as wet if they are mixed with water derived from heavy rains, escaping from a crater lake, or produced by melting snow. (source: AGI) Nevado del Ruiz volcano is part of the Andean Arc volcanoes located on the west coast of South America. The coasts of North and South America form part of the "Pacific Ring of Fire" which is a ring of active volcanoes around the Pacific Ocean and also includes the east coast of Asia and many islands. Nevado del Ruiz is located 80 miles west of Bogota, Columbia. It is one of five volcanoes in the Ruiz-Tolima volcano group. a) Define what a lahar is and name the type of volcano that typically produces this hazard..

1. Notable historic volcanic eruptions include the eruption of Nevado del Ruiz on November 13,
1985, which produced the deadliest lahar in history. Over 22,000 people lost their lives in the
lahar. A lahar is a landslide or mudflow of pyroclastic material on the flank of a volcano or a
deposit produced by such a landslide. Lahars are described as wet if they are mixed with water
derived from heavy rains, escaping from a crater lake, or produced by melting snow. (source: AGI)
Nevado del Ruiz volcano is part of the Andean Arc volcanoes located on the west coast of South
America. The coasts of North and South America form part of the "Pacific Ring of Fire" which is a
ring of active volcanoes around the Pacific Ocean and also includes the east coast of Asia and
many islands. Nevado del Ruiz is located 80 miles west of Bogota, Columbia. It is one of five
volcanoes in the Ruiz-Tolima volcano group. a) Define what a lahar is and name the type of
volcano that typically produces this hazard.