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Volcano


A volcano is a geological formation appearing above channels and cracks in the Earth's crust through which lava, ash, hot gases, water vapour, and rock fragments are erupted onto the Earth's surface

Source: "SAFETY IN EMERGENCY SITUATIONS. NATURAL EMERGENCY SITUATIONS. TERMS AND DEFINITIONS. GOST 22.0.03-97/GOST R 22.0.03-95"

(approved by the Decree of the Russian State Standard dated 25.05.1995 No. 267)

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