Seismic waves are essentially vibrations or waves that are generated from the sudden release of energy within the Earth's crust, most commonly from earthquakes, volcanic eruptions, or explosions. These waves propagate through the Earth's interior and can be detected and measured by seismometers. Seismic waves play a crucial role in the field of seismology, where scientists study and analyze these waves to gain a better understanding of the Earth's structure, composition, and dynamics. By studying seismic waves, researchers can also determine the location, magnitude, and depth of earthquakes, as well as monitor and predict volcanic activity. Additionally, seismic waves are utilized in other fields like oil and gas exploration, engineering, and even in the study of other planets and celestial bodies.