Seismic activity in central lesser antilles subduction zone from a combined on-/offshore network

In this study we present some results concerning the central Lesser Antilles Subduction Zone by using the data recorded by a temporary combined on- and o4shore seismic network. A data-set of !55 well located earthquakes, with a total of 4054 and 26!7 pickings for P- S-waves respectively, has been used to study the relationship between tectonic structures and seismicity. In particular, to obtain precise hypocentre locations, we applied the concept of minimum !D model, which incorporates the iterative simultaneous inversion of velocity and hypocenter parameters. The minimum !D model is complemented by station corrections that take into account the 3D velocity heterogeneity of the central Lesser Antilles Subduction Zone. Relocated hypocentres after the !D inversion improve our knowledge on the Subduction Zone with respect to those derived from the permanent arrays only.