The term "seismic" refers to anything related to earthquakes or the movement of the Earth's crust. It is often used in the context of measuring and studying these movements, which can be detected using specialized instruments called seismometers. These devices record the vibrations caused by seismic waves, helping scientists understand the intensity and location of earthquakes. In addition to earthquakes, "seismic" can also describe activities that cause significant changes or impacts in other fields, such as seismic shifts in public opinion or seismic events in the economy. These shifts can indicate major transformations that affect society or markets, similar to how seismic activity affects the physical landscape.