Caldera unrest prior to intense volcanism in Campi Flegrei (Italy) at 4.0 ka B.P.: Implications for caldera dynamics and future eruptive scenarios

摘要

The Campi Flegrei caldera is one of the highest risk\ud\udvolcanic areas on the Earth. Our research documents a\ud\ud150 year-long period of intense volcanism following less\ud\udthan 200 years of repose after the Agnano-Monte Spina\ud\udPlinian eruption (4.1 ka). The new data show that the\ud\udrenewal of volcanism was preceded by an uplift of a few\ud\udtens of meters, triggered by mafic refilling of reservoirs at\ud\uddepths of 3 km or less. Our studies also indicate for the first\ud\udtime the occurrence of contemporaneous eruptions from\ud\udat locations in different sectors of the caldera. These results\ud\udsuggest that a future eruptive crisis will likely be preceded\ud\udby several meters of caldera-wide uplift in response to\ud\udmagma movements at depth. The trend of uplift of the\ud\udcaldera since 1969 may thus represent the unrest expected\ud\udbefore a renewal of volcanism within an interval of decades\ud\udto centuries. Citation: Isaia, R., P. Marianelli, and A. Sbrana\ud\ud(2009), Caldera unrest prior to intense volcanism in Campi\ud\udFlegrei (Italy) at 4.0 ka B.P.: Implications for caldera dynamics\ud\udand future eruptive scenarios, Geophys. Res. Lett., 36, L21303,