Dictionary:Moveout

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Stepout, the difference in arrival time at different geophone positions. 1. Arrival times differ because of source-to-geophone distance differences (normal moveout, q.v.), because of reflector dip (dip moveout, q.v.), and because of elevation and weathering variations (static corrections, q.v.). See also delta-t. 2. Dip moveout alone; see Figure D-20.