Earthquakes tend to cause disasters to humans. It is desirable to screen them. Seismic waves are generally composed of two components, the transverse one (i.e., the S waves, which represents the up-down vibrations of crust) and the longitudinal one (P waves, left-right vibrations). The latter travels faster and can reach more distant places, while the former is more fierce. Here is a piece of work coming up with a design, which assumes a concentric structure, to shield P waves. Their numeric simulations show that, this design is efficient with a broad frequency band.
(1)Ultrabroadband Elastic Cloaking in Thin Plates
(2)brief introduction to seismic waves
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