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Unlike body waves, surface waves (also known as long waves, or simply L waves) move along the surface of the Earth. Surface waves are to blame for most of an earthquake's carnage. They move up and down the surface of the Earth, rocking the foundations of man-made structures. Surface waves are the slowest moving of all waves, which means they arrive the last.
Surface Waves. Waves are the most familiar water motion. The surface of the ocean is constantly moving, in response to local seas and to swells from distant storms. Seas result from winds pushing the water into random patterns of ripples and bumps, creating jumbles of many periods and heights interacting and breaking.