Seismometer
Videos
A seismometer is an instrument that responds to ground displacement and shaking caused by quakes, volcanic eruptions, and explosions. They are usually combined with a timing device and a recording dev
Kinemetric seismograph
Basic horizontal-motion seismograph. The inertia of the round weight tends to hold the pen still while the base moves back and forth.
Replica of Zhang Heng's seismoscope Houfeng Didong Yi
Milne horizontal pendulum seismometer. One of the Important Cultural Properties of Japan. Exhibit in the National Museum of Nature and Science, Tokyo, Japan.
Seismogram
Videos
A seismogram is a graph output by a seismograph. It is a record of the ground motion at a measuring station as a function of time. Seismograms typically record motions in three cartesian axes, with th
Seismometer
…device to form a seismograph. The output of such a device—formerly recorded on paper (see picture) or film, now recorded and processed digitally—is a seismogram. Such data is used to locate and characterize earthquakes, and to study the internal structure of Earth. A simple seismometer, sensitive to up-down…
A seismogram being recorded by a seismograph at Weston Observatory in Massachusetts
A detail of the seismogram
A container that stores a Develocorder film reel
A Develocorder film reel