Bradyseism
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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 or hydrothermal activity, particularly in volcanic calderas
The "Serapium" or Macellum of Pozzuoli demonstrated the effects of bradyseism.
Fumarole
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A fumarole is a vent through the surface of Earth or another terrestrial planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characte
Bradyseism
…Naples, is a collapsed caldera, namely a volcanic area formed by several volcanic edifices, which includes the Solfatara volcano, well known for its fumaroles. The Campi Flegrei area is especially noted for bradyseismic uplift and subsidence. The inflation and deflation of this caldera is especially well…
Fumarole at Sol de Mañana, Bolivia
Sampling gases at a fumarole on Mount Baker in Washington, United States
Traditional sulfur mining at Kawah Ijen.