Figure 1
From: Thermally-assisted Magma Emplacement Explains Restless Calderas

Campi Flegrei caldera. Green dots, third epoch vents; MN, Monte Nuovo (1538 AD eruption); Pz, Pozzuoli; Ms, Miseno; Sr, Serapeo; Sl, Solfatara; black symbols, levelling benchmarks; magenta dots, 1400–1536 data sites11; dark green stars, AGIP boreholes28; red circle, surface projection of the ~3600 m deep sill used in this work. A, B and D and related dashed lines indicate levelling routes in Fig. 2. (Map generated using GMT v. 4.5.12, http://gmt.soest.hawaii.edu/; relief from a 20-m Digital Elevation Map freely provided by the Italian Istituto Superiore per la Protezione e la Ricerca Ambientale, http://www.sinanet.isprambiente.it/it/sia-ispra/download-mais/dem20/view).