Natural disasters

An earthquake is a sudden shaking of the ground. It usually happens in Japan, China, India, the USA, Armenia, Portugal.
A hurricane is a very violent wind or storm. It usually happens in Japan, China, the Russian Federation, the Philippines.
A tornado is a very violent wind in the form of a funnel of air that spins at great speed. It usually happens in the USA.
A volcano is a mountain with a hole called a crater in the top. Sometimes lava and gases are thrown from the crater. It usually happens in Italy, Salvador, Hawaii, the Russian Federation.