Dictionary:Dip calculation

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{{#category_index:D|dip calculation}} Calculation of the dip or dip component of a reflecting or refracting interface from observations of the variation of arrival time of seismic events as the observing point is moved. May involve resolving cross-spread (q.v.) data. The dip angle for a reflection measured at the surface is usually less than the angle at the reflector because of raypath curvature.