Figure 5
From: New ground-based lidar enables volcanic CO2 flux measurements

The Campi Flegrei unrest, as illustrated by time series of (a) seismicity (number of events/week and event magnitude between September 2012 and December 2014; data from Osservatorio Vesuviano, INGV) and (b) ground uplift (blue line; uplift during 2012–2014 in millimeters, with the ground reference level obtained in January 2005) and deformation rate (orange line; monthly time average, expressed in millimeters per day) (data from ref. 36 and Osservatorio Vesuviano, INGV).
The CO2 flux time series (red line) is also shown in (b) (stars: DIAL dataset, this work; open circles, derived from in-plume Multi-GAS profiling32; data from ref. 32 and this study). (c) Long-term (2000–2014) temporal evolution of ground uplift (blue, data from ref. 36 and Osservatorio Vesuviano, INGV). The CO2 flux time series also includes the results from a survey carried out in March 2009 (data from Osservatorio Vesuviano, INGV), which was prior to the recent intensification of degassing activity at Pisciarelli. The visible escalation of degassing activity at Pisciarelli is evident from comparison of images obtained in 2005 (d, photo of G. Chiodini) and 2014 (e, photo of G. Tamburello).