Explain in brief about seismograph. Also, draw a labelled diagram of a seismograph.
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seismograph
seismographA seismograph, or seismometer, is an instrument used to detect and record earthquakes. Generally, it consists of a mass attached to a fixed base. During an earthquake, the base moves and the mass does not. The motion of the base with respect to the mass is commonly transformed into an electrical voltage. The electrical voltage is recorded on paper, magnetic tape, or another recording medium. This record is proportional to the motion of the seismometer mass relative to the earth, but it can be mathematically converted to a record of the absolute motion of the ground. Seismograph generally refers to the seismometer and its recording device as a single unit
Diagram is at attachment!!
Explanation:
A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record the motion of the ground during a quake.
The basic principle in the construction of a seismograph is that it must consist of a sufficiently heavy weight suspended in such a manner that the weight will not move when the earth over which the seismograph rests vibrates due to an earthquake.
