In this study we present some results concerning the central Lesser Antilles Subduction Zone by using the data recorded by a temporarycombined on- and o4shore seismic network. A data-set of !55 well located earthquakes, with a total of 4054 and 26!7 pickingsfor P- S-waves respectively, has been used to study the relationship between tectonic structures and seismicity. In particular, to obtainprecise hypocentre locations, we applied the concept of minimum !D model, which incorporates the iterative simultaneous inversionof velocity and hypocenter parameters. The minimum !D model is complemented by station corrections that take into account the3D velocity heterogeneity of the central Lesser Antilles Subduction Zone. Relocated hypocentres after the !D inversion improve ourknowledge on the Subduction Zone with respect to those derived from the permanent arrays only.
Seismic activity in central lesser antilles subduction zone from a combined on-/offshore network
IMPOSA, Sebastiano
2011-01-01
Abstract
In this study we present some results concerning the central Lesser Antilles Subduction Zone by using the data recorded by a temporarycombined on- and o4shore seismic network. A data-set of !55 well located earthquakes, with a total of 4054 and 26!7 pickingsfor P- S-waves respectively, has been used to study the relationship between tectonic structures and seismicity. In particular, to obtainprecise hypocentre locations, we applied the concept of minimum !D model, which incorporates the iterative simultaneous inversionof velocity and hypocenter parameters. The minimum !D model is complemented by station corrections that take into account the3D velocity heterogeneity of the central Lesser Antilles Subduction Zone. Relocated hypocentres after the !D inversion improve ourknowledge on the Subduction Zone with respect to those derived from the permanent arrays only.File | Dimensione | Formato | |
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2011 Acta Vulcanologica Lesser Antilles.pdf
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