Seis·mic

/ˈsīzmik/

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Relating to earthquakes or other vibrations of the earth and its crust.

"San Francisco will not withstand a seismic event."

Relating to or denoting geological surveying methods involving vibrations produced artificially by explosions.

Of enormous proportions or effect.

Mid 19th century: from Greek seismos ‘earthquake’ (from seien ‘to shake’) + -ic.