Translations:Signal enhancement/2/en

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The waves that make up each trace take a great variety of paths, each requiring a different time to travel from source to receiver. Some waves are refracted, and others are scattered. Some waves travel along the earth’s surface, and others have been reflected upward from various interfaces. To reiterate, a primary reflection is an event that represents a seismic wave’s passage from the source to the depth point and then its passage directly back to the receiver. A multiple reflection is an event that has undergone three or five or some other odd number of reflections in its travel path. In other words, a multiple takes a zigzag course with the same number of down and up legs.