Three-dimensional P-wave velocity structure of Mt. Etna, Italy
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Abstract
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.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Three-dimensional P-wave velocity structure of Mt. Etna, Italy |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/98GL01240 |
| Volume | 25 |
| Issue | 10 |
| Year Published | 1998 |
| Language | English |
| Publisher | American Geophysical Union |
| Description | 4 p. |
| First page | 1975 |
| Last page | 1978 |
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