Bradyseism

prefLabel
  • bradyseism
definition
  • A long-continued, extremely slow vertical instability of the crust, as in the volcanic district west of Naples, Italy, where the Phlegraean bradyseism has involved up-and-down movements between 6 m below sea level and 6 m above over a period of more than 2.000 years.
inScheme
broader
broadMatch
  • http://eurovoc.europa.eu/5890
Abstract from DBPedia
    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. 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.

    (Source: http://dbpedia.org/resource/Bradyseism)