CK-12 Earth Science 7.3 vocabulary
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seismometer
Modern device that uses electronic motion detectors to measure and record seismic waves and other ground motions
seismograph
Older type of device that measures and records seismic waves using a suspended, weighted pen that writes on a drum of paper that moves with the ground
seismogram
Paper record of seismic activity produced by a seismograph or seismometer
Mercalli intensity scale
Scale of earthquake intensity based on what people feel and the extent of damage caused by the earthquake
Richter magnitude scale
Scale of earthquake magnitude based on the amplitude of the largest seismic wave produced by an earthquake
moment magnitude scale
Scale of earthquake magnitude based on the total amount of energy released by an earthquake