A whole barrio built on a mountain collapsed in the Colombian city of Manizales, with 48 people disappeared/dead. Days before, the inhabitants had reported strong underground noises similar to "water hammers", whose vibrations and shocks weakened the soil structure causing the "derrumbe". The water company says that they had extracted a 20 liter bucket cought in the 16 inch pipe that had obstructed the water flow and caused subsequent "explosion" of the pipe and the tragic mudslade.
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