One of the world's deadliest volcanos has laid dormant since it last erupted in 1985, but a surge in seismic activity indicates it could awaken in the 'coming days.'Colombia's Nevado del Ruiz registered an unbelievable 6,000 per day last week, leading officials to raise the alert to the second highest scale and evacuate more than 2,5000 families in the area.Some 57,000 people live in the volcano's hazard zone, which is spread across parts of six provinces, according to Colombia's Geological Service (CGS).
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