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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. It can persist for millennia in between eruptions and each uplift event is normally accompanied by thousands of small to moderate earthquakes.[1] The word derives from the ancient Greek words βραδύς bradús, meaning "slow", and σεισμός seismós meaning "movement", and was coined by Arturo Issel in 1883.[2][3][4]
- ^ De Natale, G.; Troise, C.; Pingue, F.; Mastrolorenzo G.; Pappalardo L.; Battaglia M.; Boschi E. (2006). "The Campi Flegrei caldera: unrest mechanisms and hazards". In Troise C., De Natale G. & Kilburn C.R.J. (ed.). Mechanisms of activity and unrest at large calderas. Special Publications. Vol. 269. London: Geological Society. p. 28. ISBN 978-1-86239-211-3. Retrieved 14 July 2011.
- ^ Cite error: The named reference
Scandonewas invoked but never defined (see the help page). - ^ Orsi, G.; Civetta L.; de Vita S.; Di Vito M.A.; Isaia R.; Petrazzuoli S.M.; Ricciardi G.P.; Ricco C. (1999). "Short-term ground deformations and seismicity in the resurgent Campi Flegrei caldera (Italy): an example of active block-resurgence in a densely populated area". Journal of Volcanology and Geothermal Research. 91 (2–4). Elsevier: 415–451. Bibcode:1999JVGR...91..415O. doi:10.1016/S0377-0273(99)00050-5.
- ^ "Bradyseism in the Flegrea Area". UNESCO World Heritage Centre. Retrieved 19 July 2011.