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| a long, narrow opening or line of breakage made by cracking or splitting, especially in rock or earth. |
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| a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant. |
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| an active volcano that is not erupting, but supposed to erupt again. |
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| An effusive eruption is a type of volcanic eruption in which lava steadily flows out of a volcano onto the ground. |
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| an act or instance of erupting. |
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| a volcanic eruption of the most violent type. |
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| An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future. |
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| a destructive mudflow on the slopes of a volcano. |
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| A magma chamber is a large pool of liquid rock beneath the surface of the Earth. |
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| a fast-moving current of hot gas and volcanic matter that moves away from a volcano about 100 km/h on average but is capable of reaching speeds up to 700 km/h |
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| rock fragments and particles ejected by a volcanic eruption. |
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| the state of being thick, sticky, and semifluid in consistency, due to internal friction. |
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| a large volcanic crater, especially one formed by a major eruption leading to the collapse of the mouth of the volcano. |
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| a cone formed around a volcanic vent by fragments of lava thrown out during eruptions. |
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| a volcano built up of alternate layers of lava and ash. |
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| a broad domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava |
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| DescriptionA supervolcano is a large volcano that has had an eruption with a Volcanic Explosivity Index of 8, the largest recorded value on the index. |
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| a hot spring in which water intermittently boils, sending a tall column of water and steam into the air. |
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| a spring of naturally hot water, typically heated by subterranean volcanic activity. |
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| a mound of viscous lava which has been extruded from a volcanic vent. |
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| A volcanic plateau is a plateau produced by volcanic activity. There are two main types: lava plateaus and pyroclastic plateaus. |
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