The eruption of Nevado del Ruiz volcano in Colombia caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

The eruption of Nevado del Ruiz volcano in Colombia caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

Rescue workers look for survivors after the eruption of the Nevado del Ruiz volcano in Colombia. The volcano caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

Rescue workers use hose-pipes to clean survivors of the eruption of Nevado del Ruiz volcano in Colombia. The eruption caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

Rescue workers use care for survivors of the eruption of Nevado del Ruiz volcano in Colombia. The volcano caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

The eruption of Nevado del Ruiz volcano caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

Rescue workers care for survivors of the eruption of Nevado del Ruiz volcano in Colombia. The volcano caused a massive avalanche of mud. Residents Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

Rescue workers use hose-pipes to clean survivors of the eruption of Nevado del Ruiz volcano in Colombia. The volcano caused a massive avalanche of mud. Residents of Armero were notified not to be alarmed, but within minutes the town virtually disappeared and over 23,000 died.

Science & Technology,2nd prize