page_title: Bradyseism
hierarchical_section_title: Bradyseism
caption_attribution_description: English: Serapeum, roman temple dedicated to the god Serapis, Pozzuoli, Italy. Español: Serapeum, templo romano dedicado al dios Serapis, en Pozzuoli, Italia.
context_page_description: Bradyseism is the gradual uplift or descent of part of the Earth's surface caused by the filling or emptying of an underground magma chamber and/or hydrothermal activity, particularly in volcanic calderas. It can persist for millennia in between eruptions and each uplift event is normally accompanied by thousands of small to moderate earthquakes. The word derives from the ancient Greek words "bradus", meaning 'slow', and "seism" meaning 'movement', and was coined by Arturo Issel in 1883.
context_section_description: 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 and/or hydrothermal activity, particularly in volcanic calderas.  It can persist for millennia in between eruptions and each uplift event is normally accompanied by thousands of small to moderate earthquakes. The word derives from the ancient Greek words "bradus", meaning 'slow', and "seism" meaning 'movement', and was coined by Arturo Issel in 1883.
caption: The "Serapium" or Macellum of Pozzuoli demonstrated the effects of bradyseism.
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