In this thesis work we have presented a seismic hazard investigation conducted at Debrezite area,rncentral Ethiopia. In this work we carried out a probabilistic seismic hazard analysis with anrnemphasis on the local site conditions. The analyses were carried out using the ISC-GEMrn(International Seismological Center and Global Earthquake Model) earthquake cataloguernavailable over a radius of 200 km around Debrezeit city considering destructive earthquakesrnfrom 1906 to 2011. The analysis was also carried out by considering known seismogenic sourcesrnthat are identified on the basis of seismicity and tectonics. Earthquake data from ISC-GEMrn(International Seismological Center and Global Earthquake Model) catalogue were analyzedrnstatistically and Gutenburg-Richter recurrence relation is used to obtain the b-value of 0.67, 1.03rnand 1.11 for the three seismic zones: Main Ethiopian Rift, Afar and Escarpment respectively thatrnare considered to generate earthquakes that affect the Debrezeit area.rnSeismic refraction data was collected at Kuriftu site, Debrezeit using McSEIS-SX24rnseismogram. Multi-Channel Analysis of Surface Waves method is used to analyze the surfacernwaves and determine the shear wave velocity at the depth of 30m. SeisImager/ SW softwarernwere used to produce a 2-D shear-wave velocity section. The shear wave velocity observed atrnKuriftu site has the mean Vs30 value of 360m/s. Therefore, according to the National EarthquakernHazard Reduction Program classification the site can be classified under soil class C. Based onrnthe site classification value, we can conclude that the main part of the study area is underrnsubstantial risk of soil amplification.rnAfter the implementation of a seismic hazard analysis by using CRISIS2012 software, thernprobabilistic seismic hazard curves: Exceedance probability and Uniform Hazard Spectrumrncurves were developed based on the selected attenuation relationship, with a probability ofrnexceedance of 10% in 50, 100, 250 and 500 years to a return period of 475 years for bed rockrncondition and considering local site effects. On the other hand the highest hazard levels wererndetermined at soil site for Debrezeit, the peak ground acceleration and spectral accelerationrnvalues calculated based on attenuation relationship by (Campbell and Bozorgnia 2008) werernfound to be applicable for 10% probability of exceedance in 50, 100, 250 and 500 years, takingrninto consideration the fact that a considerable portion of the city is founded over alluviums.