Bradyseism

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Notion

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Science and technology

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What Wikipedia says

Bradyseism is the gradual uplift (positive bradyseism) or descent (negative bradyseism) of part of the Earth's surface caused by the filling or emptying of an underground magma chamber or hydrothermal activity, particularly in volcanic calderas.

Excerpt from the Wikipedia article “Bradyseism”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Ferdinando Marfella, CC BY-SA 2.0, via Wikimedia Commons.