On the basis of the analysis of geological, tectonic characteristics and ea
rthquake manifestation features, a causative relation between geodynamic re
gime and seismicity has been established for the southeastern coastal zone
and continental shelf of Vietnam. The probabilistic methods have been used
to evaluate ground shaking effects at Nha Trang city as well as for the ent
ire study area. Short, intermediate and long term predictions of ground sha
king (in the form of peak ground acceleration maps) show high risks in the
coastal zone of central Vietnam and in the southeastern continental shelf o
f the country.