“ At least 20 volcanoes will probably be erupting as you read these words, ” states a report by the Smithsonian Institute in the United States.
हे सहसा अशा ठिकाणी घडते जेथे दोन भूपट्ट एकमेकांना भिडतात व एक भूपट्ट दुसऱ्‍या भूपट्टाच्या खाली सरकतो.