A restless caldera Campi Flegrei is a sinking caldera. Subsidence has been interrupted in four episodes since 1950. When secular subsidence is removed, the first three episodes triggered corrected uplifts of 75-175 cm in about two years at intervals of 10-20 years (Kilburn et al., 2017). The current episode has continued with a previously unseen style of behaviour: twenty years of additional subsidence until 2000, followed by slow uplift that by 2017 had returned the corrected uplift to its 1984 level.
