Seismic Evidence for a Low-Velocity Zone in the Upper Crust Beneath Mount Vesuvius

Details Seismic Evidence for a Low-Velocity Zone in the Upper Crust Beneath Mount Vesuvius Seismic Evidence for a Low-Velocity Zone in the Upper Crust Beneath Mount Vesuvius

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996sci...274..592z&link_type=abstract

Science, Volume 274, Issue 5287, pp. 592-594

Physics

37

Scientific paper

A two-dimensional active seismic experiment was performed on Mount Vesuvius: Explosive charges were set off at three sites, and the seismic signal along a dense line of 82 seismometers was recorded. A high-velocity basement, formed by Mesozoic carbonates, was identified 2 to 3 kilometers beneath the volcano. A slower (P-wave velocity V_P backsimeq 3.4 to 3.8 kilometers per second) and shallower high-velocity zone underlies the central part of the volcano. Large-amplitude late arrivals with a dominant horizontal wave motion and low-frequency content were identified as a P to S phase converted at a depth of about 10 kilometers at the top of a low-velocity zone (V_P < 3 kilometers per second), which might represent a melting zone.

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