What is a seismometer used to measure?
Seismometer measuring from these types of media can be done by hand. After the digital processing has been used, the archives of the seismic data were recorded in magnetic tapes. Due to the deterioration of older magnetic tape medias, large number of waveforms from the archives are not recoverable. Seismometer A seismometer is an instrument that measures ground motions, such as caused by earthquakes, volcanic eruptions, and explosions. Records of seismic waves (seismograms) allow seismologists to locate and measure the size of events like these, and to map the Earth's internal structure. A simple seismometer, sensitive to up-down motions of the
Seismometer "seismós" and γράφω, "gráphō", to draw. It is often used to mean "seismometer", though it is more applicable to the older instruments in which the measuring and recording of ground motion were combined, than to modern systems, in which these functions are separated. Both types provide a continuous record of ground motion; this record distinguishes them from seismoscopes, which merely indicate that motion has occurred, perhaps with some simple measure of how large it was. The technical discipline concerning such devices is called seismometry, a branch of seismology. The concept of measuring the "shaking" of something means that the word