natural phenomenon where lava, hot gases or other substances are emitted suddenly from a geological feature
A volcanic eruption is when lava, hot gases, and other materials are suddenly released from a volcano beneath the Earth's surface. These eruptions matter because they can significantly affect the surrounding environment, people, and landscapes.
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via PubMed
Some of the eruptive structures formed during volcanic activity (counterclockwise): a Plinian eruption column, Hawaiian pahoehoe flows, and a lava arc from a Strombolian eruption
A volcanic eruption occurs when material is expelled from a volcanic vent or fissure. Several types of volcanic eruptions have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series.
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