what is a seismograph
A seismograph is simply a device that can measure the intensity of a âseismicâ type of activity such as an earthquake.But aside from the earthquakeâs intensity, seismographs can also measure and record the earthquakeâs duration and direction.he basic concept of seismographs or seismometers is that it involves an internal mass or weight since it will also move during an earthquake. Using a system of levers, weights, springs, and electronics in modern versions, seismographs are able to record information on the shaking of the ground.