Thick clouds of grey smoke rising into the sky.

Thick clouds of grey smoke rising into the sky as a volcano erupts.

Thick clouds of grey smoke rising into the sky as a volcano erupts. Rock from the volcano crumbles into the molten lava below.

Thick clouds of smoke rising into the sky as a volcano erupts.

Oklahoma, USA: A powerful tornado tearing through a field with dirt spiralling around the tornado column.

Sequence of shots showing a tornado swirling and spiralling across the sea, stirring up water off Limasol in Greece

Chunks falling off the Perito Moreno glacier in Santa Cruz, Argentina.

Texas, USA: A large tornado forming with lots of dust swirling ominously between the tornado cloud and ground.

A huge black cloud of smoke rises in the distance.

Thick smoke clouds and flames rise into the sky.

Kansas, USA: A white tornado column reaching to the ground. Camera zooms in as the tornado hits a dwelling behind trees and debris flies violently in the rotating air.