The area around the Pacific ocean a ring contains three quaiters of the earth's volcanoes; that's about 450 volcanoes. There are many active volcanoes in the island nation of Indonesia in the Pacific ocean off the coast of Asia. This area is home to the volcanic island of Krakatoa. The volcano on Krakatoa erupted in 1883 in one of the world's deadliest volcanic events. The tsunami, caused by this eruption kill 36000 people.