Abstract

SOBIESIAK, MONIKA  and  LEONARDO, ALVARADO. Recent seismicity in Northeastern Venezuela and tectonic implications. Rev. Fac. Ing. UCV [online]. 2005, vol.20, n.4, pp.75-84. ISSN 0798-4065.

In this study we present results from the investigation of recent seismic activity in northeastern Venezuela and the southeastern Caribbean (9o - 13.5o N and 59o - 65o W). We were able to map precise and detailed hypocenters by relocating existing data sets and because of the deployment of broad band instruments in this region beginning at the end of 2000. We identify a hypocentral gap at about 40 km depth between shallow seismicity belonging to the strike slip environment and the seismicity of the subduction environment. Furthermore, we map a column-like hypocentral structure in the subduction area. From results of statistical studies we hypothezize interactions between the two tectonic regimes such as changes in the actual local and regional stress fields of both environments by cross triggering of seismic events.

Keywords : seismicity; interactions of transcurrent and subduction regime; oriental region of Venezuela.