# Dictionary:Apparent dip

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{{#category_index:A|apparent dip}}
**1**. The angle that an emerging seismic wavefront makes with the surface; the angle whose tangent is the ratio of the vertical-to-horizontal components of displacement produced by a P-wavefront. Apparent dip can be related to the true dip of the reflector if the cross-dip and velocity distribution are known. Compare *dip moveout* and *apparent velocity*. **2**. The angle from horizontal for a refracting horizon determined from the updip and downdip velocities of head waves; see Figure R-10. **3**. The dip of a rock layer exposed in a section that is not at a right angle to the strike.