INGV monitoring reports that Campi Flegrei’s current bradyseismic phase began in 2005 and remains active. Ground uplift at the Rione Terra GNSS station reached approximately 100 centimetres above 2005 levels by October 2022, while monitoring has recorded uplift rates varying from 10±3 to 30±5 millimetres per month. The affected caldera has experienced approximately 90 metres of cumulative uplift over the last 10,000 years, and the current alert level has been Yellow since 2012.[1][2]
The principal lesson is that persistent deformation can continue without a simple, linear path to eruption. INGV research identifies a long-term acceleration of approximately 0.7–0.8 centimetres per year squared and finds that increasing uplift speed raises the probability of earthquakes in subsequent months; however, short-term uplift and seismicity do not correspond reliably enough to support precise prediction.[4][5] For lunar habitats, this supports designing monitoring and emergency systems around gradual precursor trends, coupled hazards, and uncertainty rather than a single catastrophic threshold.
The Ark team should integrate a continuously updated deformation-risk framework: track millimetre-scale structural movement, seismic activity, thermal output, gas chemistry, and subsurface fluid behaviour as separate but correlated indicators. Research should prioritise autonomous GNSS-equivalent surveying, radar interferometry, fibre-optic strain sensing, distributed seismic networks, and decision thresholds that trigger inspection, crew sheltering, data replication, or evacuation without waiting for definitive failure forecasts.