Del Negro, C., E. Armadillo, E. Bozzo, L. Cafarella, A. Meloni, R. Napoli, and A. Zirizzotti. 1998. “Piezomagnetic Effects Induced by Artificial Sources at Mt. Vesuvius (Italy): Preliminary Results of an Experimental Survey”. Annals of Geophysics 41 (3). https://doi.org/10.4401/ag-4344.