👉 The term "seismographical" is a combination of two words, both related to seismic waves. Seismic waves are electromagnetic waves that propagate through Earth's crust and mantle, causing震动和颤动。In other words, they are the vibrations caused by an earthquake or volcanic eruption. Seismological data refers to information obtained from seismograms, which represent the movement of seismic waves in the Earth’s crust and mantle. These data can be used for a variety of purposes, such as predicting
