1. n. [Geophysics]

The duration of time for a P-wave to travel one foot, typically displayed on an acoustic log. The unit of microseconds per foot (or meter) is called the slowness, which is the inverse of velocity. Transit time is measured in microseconds per foot (μs/ft) or in microseconds per meter (μs/m).

Synonyms: interval transit time

See: acoustic,  cycle skip,  delta t,  drift,  P-wave