About 2 million people live in the city of Naples and in close proximity to a large active volcano: Campi Flegrei (no, not Vesuvius). This volcano is currently under unrest and since 1950 this is the 4th episode of ground uplift, heighten seismicity, and enhanced gas emissions.

New publication by Caricchi et al. in Earth & Environment https://www.nature.com/articles/s43247-025-03140-0