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seismic metamaterials
Seismic metamaterials, are metamaterials which are designed to counteract the adverse effects of seismic waves on artificial structures, which exist on or near the surface of the earth.〔〔 seismic metamaterials were still in the development stage.〔〔
==The mechanics of seismic waves==
More than a million earthquakes are recorded each year, by a worldwide system of earthquake detection stations. The propagation velocity of the seismic waves depends on density and elasticity of the earth materials. In other words, the speeds of the seismic waves vary as they travel through different materials in the earth. The two main components of a seismic event are body waves and surface waves. Both of these have different modes of wave propagation.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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