Seismic surface waves travel along the Earth's surface. They can be classified as a form of mechanical surface waves. They are called surface waves, as they diminish as they get further from the surface. They travel more slowly than seismic body waves (P and S). In large earthquakes, surface waves can have an amplitude of several centimeters.
gnaw meaning, definition, what is gnaw: to bite or chew something repeatedly, usually making a hole in it or gradually destroyingâ¦. Learn more.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  snag(Noun) A stump or base of a branch that has been lopped off; a short branch, or a sharp or rough branch; a knot; a protuberance. 2  snag(Noun) A tooth projecting beyond the rest; contemptuously, a broken or decayed tooth.