This data publication is related to the article of Buono et al. (2025) and contains the results of 4D X-ray microtomography investigations of well rocks from the Campi Flegrei caldera conducted at the micro-CT laboratory of the Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Vesuviano, part of EPOS TCS Multi-Scale Laboratories. 3D X-ray images were acquired before and after compression experiments and were combined with time-resolved 2D X-ray images taken during both indirect tensile and compression tests, which are also complemented by the experimental raw data. 3D scans with higher resolution of samples before compression experiments are also provided.

Samples refer to rocks cored from SV1 (40.8483°N, 14.1209°E), the deepest and most centrally located exploratory geothermal well within the Campi Flegrei caldera.

Related projects: INGV Progetto Dipartimentale LOVE-CF, PON-GRINT, PNRR (National Recovery and Resilience Plan) funded project MEET, Horizon 2020 projects EXCITE and EPOS.