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In this section, we could expand on this to include why seismic metamaterials had been thought of to help and protect. Additionally, what seismic waves are being generated (i.e. from humans, from the earth below and from the ocean waves). Then it would be important to talk about the difference in amplitudes. That would help to frame the work of metamaterials development. Additionally, it would be helpful to understand the limitations and difficulties of creating seismic metamaterials themselves. -- Cosmojellyfish ( talk) 18:17, 24 September 2019 (UTC) reply