What is a creep meter?

It is a measurement device to determine if slow movement is taking place between two parts of an object. An example is two sides of a potential earthquake fault line or rocks on a cliff that may produce an avalanche.

Creep meters an be made from piezoelectric sensors that measure changes in the relative positions of material on each side of the material that may move through compression or tension. They can also measure the distances by the interference patterns of light bounced back from the moving side of the system.