A cap of snow can be seen over the summit of Colombia's Nevado del Huila.
More than a hundred volcanic tremors within a 24-hour period prompted residents of Colombia’s Cauca and Huila departments to abandon their homes in fear of an eruption from Nevado del Huila.
Vulcanologists say that the tremors are being caused by the movement of lava within the mountain, which unleashed a flow of debris down its slopes in 1994, killing more than 1,000 people.
Eruptions of Nevado del Huila last year were the first on record since the mid-16th century.
Heat from that eruption caused the crown of ice and snow on the volcano to melt rapidly.
The resulting flash floods and mudslides swept away houses and bridges, and submerged large tracts of farmland.
Nevado del Huila is Colombia's third-highest peak at 18,484 feet (5,634 metres). It is located 170 miles (270 km) southwest of Bogota.
Photo: National Parks of Colombia