Dictionary:Time-lapse seismology

{{#category_index:T|time-lapse seismology}} Repeating a seismic survey to determine the changes that have occurred in the intervening time, such as may be caused by production. Results are often displayed as difference sections or maps. When using multiple 3D surveys run at different times, this is sometimes called a 4D survey, the fourth dimension being the intervening time (Jack, 1998).