Mudflow formed of a fluid mixture of water and volcanic ash. During a volcanic eruption, melting ice may combine with ash to form a powerful flow capable of causing great destruction. The lahars created by the eruption of Nevado del Ruiz in Colombia, South America, in 1985 buried 22,000 people in 8 m/26 ft of mud.
Blue represents the sky and the sea. Yellow symbolizes the sun which gives light and life. Red reflects the people and their determination to work in the future in unity and love. White stands for justice and harmony. Green recalls the land and nature. Effective date: 8 January 1996.