Accelerograph vs. Accelerometer — What's the Difference?

An accelerograph can be referred to as a strong-motion instrument or seismograph, or simply an earthquake accelerometer. They are usually constructed as a self-contained box, which previously included a paper or film recorder (an analogue instrument) but now they often record directly on digital media and then the data is transmitted via the Internet.Accelerographs are useful for when the earthquake ground motion is so strong that it causes the more sensitive seismometers to go off-scale.

An accelerometer is a tool that measures proper acceleration. Proper acceleration is the acceleration (the rate of change of velocity) of a body in its own instantaneous rest frame; this is different from coordinate acceleration, which is acceleration in a fixed coordinate system.

An accelerometer equipped to measure and record ground motion such as seismic activity.

An instrument used to measure acceleration.

(military) An apparatus for studying the combustion of powder in guns, etc.

An instrument for measuring acceleration.

(geology) An instrument used to record the acceleration of the ground during an earthquake.

An instrument made for detecting and measuring vibrations.

An apparatus for studying the combustion of powder in guns, etc.

An apparatus for measuring the velocity imparted by gunpowder.

An instrument for measuring the acceleration of aircraft or rockets