General on earthquakes: reasons of origin and types of earthquakes, seismic waves, characteristics of earthquake soil movement, earthquake registration, intensity of seismic action and seismic scales. Analysis of structure behaviour in earthquake action: constrained damped model vibrations due to dynamic foundation movement, response spectre methods, modal analysis. Designing seismically resistant structures: basic objectives and demands for seismic protection, design methodology, measures for decreasing seismic risk. Designing according to contemporary regulative: design requirements and criteria for buildings, bridges, support structures and other engineering facilities.