Definitions

1. adjective

relating to or caused by earthquakes or the movements of the earth’s crust

“The seismic activity in the region has been increasing over the past few months.”

2. noun

a seismic wave; a wave caused by the movement of the earth’s crust, especially a seismic wave produced by an earthquake

“The scientists studied the seismic waves produced by the earthquake to gain a better understanding of its impact.”