Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11058
Authors: Chiodini, Giovanni* 
Selva, Jacopo* 
Del Pezzo, Edoardo* 
Marsan, D.* 
De Siena, L.* 
D’Auria, L.* 
Bianco, Francesca* 
Caliro, Stefano* 
De Martino, Prospero* 
Ricciolino, Patrizia* 
Petrillo, Zaccaria* 
Title: Clues on the origin of post-2000 earthquakes at Campi Flegrei caldera (Italy)
Journal: Scientific reports 
Series/Report no.: /7 (2017)
Issue Date: 30-Jun-2017
DOI: 10.1038/s41598-017-04845-9
Abstract: The inter-arrival times of the post 2000 seismicity at Campi Flegrei caldera are statistically distributed into different populations. The low inter-arrival times population represents swarm events, while the high inter-arrival times population marks background seismicity. Here, we show that the background seismicity is increasing at the same rate of (1) the ground uplift and (2) the concentration of the fumarolic gas specie more sensitive to temperature. The seismic temporal increase is strongly correlated with the results of recent simulations, modelling injection of magmatic fluids in the Campi Flegrei hydrothermal system. These concurrent variations point to a unique process of temperature-pressure increase of the hydrothermal system controlling geophysical and geochemical signals at the caldera. Our results thus show that the occurrence of background seismicity is an excellent parameter to monitor the current unrest of the caldera.
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