What is Seismography ? Explain it .
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»»seismograph. ««
A 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.
Step-by-step explanation:
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Step-by-step explanation:
A seismograph, or seismometer, is an instrument used to detect and record earthquakes
The mechanism on how it works
Seismographs record seismic waves. They contain a weight and a pen attached to a spring (below). The seismograph is bolted to the ground so during an earthquake it moves with the ground, whilst the weight and pen remain still. The pen moves across a rotating paper roll recording the seismic waves.
There are three types of seismographs
Modern seismometers include three (3) elements to determine the simultaneous movement in three (3) directions: up-down, north-south, and east-west. Each direction of movement gives information about the earthquake.