Three-dimensional P-wave velocity structure of Mt. Etna, Italy

Villaseñor, A.; Benz, H. M.; Filippi, L.; De Luca, G.; Scarpa, R.; Patanè, G.; Vinciguerra, S.
Referencia bibliográfica

Geophysical Research Letters, Volume 25, Issue 11, p. 1975-1978

Fecha de publicación:
6
1998
Número de autores
7
Número de autores del IAC
0
Número de citas
48
Número de citas referidas
48
Descripción
The three-dimensional P-wave velocity structure of Mt. Etna is determined to depths of 15 km by tomographic inversion of first arrival times from local earthquakes recorded by a network of 29 permanent and temporary seismographs. Results show a near-vertical low-velocity zone that extends from beneath the central craters to a depth of 10 km. This low-velocity region is coincident with a band of steeply-dipping seismicity, suggesting a magmatic conduit that feeds the summit eruptions. The most prominent structure is an approximately 8-km-diameter high-velocity body located between 2 and 12 km depth below the southeast flank of the volcano. This high-velocity body is interpreted as a remnant mafic intrusion that is an important structural feature influencing both volcanism and east flank slope stability and faulting.