Shouting cannot cause an avalanche.
Powerful quakes strike near the Earth's plate boundaries.
Floods destroy homes, take lives and spread disease.
Despite the damage they cause, small fires can be good for forests.
The 1970 Bangladesh cyclone is the most deadly in recorded history.
There was a huge landslide when Mount St Helens erupted.
Humans have never witnessed a super-eruption.
Tornadoes form quickly and leave trails of destruction.
Earthquakes can create deadly ocean waves.
Eruptions cause widespread destruction and death but are vital for our survival.