Deterministic seismic hazard assessment developed in 1960s is the oldest method of analysis of seismic ground response. This paper describes the application of seismic hazard assessment to obtain the Peak Ground Acceleration at major cities in Sri Lanka due to an oceanic earthquake. Two earthquakes, occurred in 2011 and 2012 in the above region, were chosen for the validation of suitable attenuation relationships for the region. The comparison shows that, out of the two attenuation relationships investigated, Gitterman et al. (1993) relationship gives the bestprediction.