The stress field of Vrancea region from fault plane solution (FPS)

Abstract

The fault plane solutions (FPS) of 247 seismic events were used for stress field investigation of the region. The eigenvectors <i><b>t</i></b>, <i><b>p</i></b>, <i><b>b</i></b>, and moment tensor <b>M</b> components for each FPS were defined and computed numerically. The obtained results confirm the hypothesis of subduction-type intermediate depth earthquakes for the Vrancea seismic region and this may be considered the first approximation of the stress field for the whole of the Vrancea (intermediate depth) region.