Open AccessFluid inclusion and petrological studies elucidate reconstruction of magma conduits
Author(s) -
Frezzotti Maria Luce,
Peccerillo Angelo
Publication year - 2004
Publication title -
eos, transactions american geophysical union
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 86
eISSN - 2324-9250
pISSN - 0096-3941
DOI - 10.1029/2004eo160001
Subject(s) - geology , caldera , unrest , volcano , induced seismicity , magma , seismology , earthquake swarm , electrical conduit , phreatic eruption , geochemistry , law , mechanical engineering , engineering , politics , political science
In the summer of 1982, the Phlegraean Fields, a nested resurgent caldera located in the densely populated Naples area of Italy started to give signals of unrest. However, after about 30 months of soil uplift (up to 5 mm per day) and intense shallow‐depth, swarm‐type seismicity (up to 100 shocks/hr), these phenomena diminished and alert warning for an imminent volcanic eruption ceased. A similar scenario went on at Vulcano, Italy where an increase in the amount of fumarolic output and in gas temperatures (more than 700°) began in the winter of 1992. Also in this case, no eruption occurred, and gas temperatures and emission rates slowly returned to their normal values.