When to Use Accelerograph?

Accelerographs are useful for when the earthquake ground motion is so strong that it causes the more sensitive seismometers

to go off-scale. There is an entire science of strong ground motion, that is dedicated to studying the shaking in the vicinity of earthquakes (roughly within about 100 km of the fault rupture).

What is the difference between seismograph and accelerograph?

As nouns the difference between accelerograph and seismograph. is that accelerograph is (military) an apparatus for studying the combustion of powder in guns, etc while seismograph is an instrument that automatically detects and records the intensity, direction and duration of earthquakes and similar events.

How does an accelerograph work?

An accelerometer is a device that measures the vibration, or acceleration of motion of a structure. The force caused by vibration or a change in motion (acceleration) causes the mass to "squeeze" the piezoelectric material which produces an electrical charge that is proportional to the force exerted upon it.