The antiresonance phenomena in seismic microzonation

Abstract

The interference of incident and reflected seismic waves in the ground massif near
 the day surface is the cause of resonant effects. In the practice of seismic microzonation (SMZ),
 a resonant increase in the total seismic intensity is of particular importance. At the same time, the
 presence of inverse layers in the ground layers interference leads to a decrease in the intensity of
 the total seismic impact, what is naturally named antiresonance. The article considers the
 conditions for the occurrence of antiresonance and evaluates the limits of its effectiveness. The
 natural and man-made causes of antiresonance and the possibility of using it to reduce the
 intensity of seismic impacts are particularly noted.