Observation of volcanic tremor at Mt Vesuvius discovered from the analysis of array data.

P–S wave pairs with constant T_s−T_p$T_{\mathrm{s}}-T_{\mathrm{p}}$ time permits a precise estimation of the source depth.

The source is located at depth between 5 km and 6.5 km bsl.

Vesuvius tremor has the same spectral contents of VT earthquakes located at the same depth.

Vesuvius tremor is a sequence of low frequency shear failures occurring in a transition zone.