Power and energy spectra are considered as additional criteria for the intensity of technogenic, dynamic and seismic impacts. Analyzing the consequences of a number of destructive earthquakes, it was revealed that the intensity of seismic impacts, in addition to ground acceleration, directly depends on the spectral characteristics of the energy and power of external influences. When calculating the design of dynamically tenacious systems, it is necessary to take into account the power and energy spectra in addition to the acceleration spectrum.