E é o SEGUNDO na região, hein? Já tinha havido outro semelhante em 2007...
Pra quem quiser entender:
The gaping holes are usually caused by rainwater gradually eating away at porous rock such as limestone below the surface, weakening it, and creating a honeycomb of caverns and caves which can become packed with mud. Floodwater may have flushed away that mud - leading everything above it to collapse.
Read more: http://www.dailymail.co.uk/news/worldne ... z0pwmTqEpP
It's a phenomena known as Karst Topography. It happens anywhere there is limestone rich soils, a lot of sinkholes form in NorthEast Pennsylvannia, where I'm from, as well as down near Pittsburgh. Our sinkholes in PA mostly happen due to the removal of coal.
Basically, groundwater (or over-saturated soils) erode the limestone which forms caverns. Once the water moves away from the area (after the storm, the waters will run off into streams, etc) the caverns are exposed underground. Without the pressure of the water, the Earth cannot support the load above it. If there is developments above the cavern, sinkholes will likely form.
[b]Jambock__17 - Vulture
[i]"Na cidade-mar, você quem manda em tudo
[color=red]FLAMENGO[/color], Brasil
Você é grande no mundo"[/i][/b]