Related to, or caused by an earthquake or other vibration of the Earth. / (figuratively) Of very large or widespread effect.

(geology) A measure or a degree of how seismic a region is or how prone it is to earthquakes.

In a seismic manner; with the qualities of an earthquake.

plural of seismicity

seismic

Any of several forms of vibrational waves that travel through the Earth as the result of an earthquake or underground explosion.

(geology) the region between the surface of the Earth and the asthenosphere characterized by the efficient propagation of seismic waves

A technique used to determine the nature of sedimentary rocks by the analysis of seismic data; used especially in oil prospecting

An assessment of the probability that the social or economic consequences of an earthquake would exceed a specific value at a specific place and time; used in the planning of buildings etc.

(geology) A quantity used to determine the size of an earthquake. Calculated either from a seismogram, or from the measurement of the area affected and the displacement of the rocks.