Nevado del Huila: Huila, the highest active volcano in Colombia, is a stratovolcano constructed inside an old caldera. The volcano is seen here from the SW.Courtesy Juan Carlos Diago, 1995 (Bernardo Pulgarín, INGEOMINAS, Colombia).Nevado del Huila, a volcano in Columbia, erupted shortly before midnight on Monday forcing about 3,500 people to evacuate. The eruption was preceded by seismic activity that started on April 8.

Nevado del Huila last erupted in 2007, causing flooding and mud flows (lahars) as the eruption melted the snow and ice cap on top of the tallest active volcano in Columbia.

Before this recent activity, Nevado del Huila had been quiet since the 16th century.

In 1985 25,000 people were killed when another Columbian volcano, Nevado del Ruiz, erupted initiating a series of deadly lahars.