Summarise the following paragraph A seismograph (say: size-mo-graf) is a special piece of equipment that records earthquakes by drawing them. The base of the seismograph is on the ground and above it a weight hangs from a string. When there is an earthquake, the base shakes with the ground but the weight does not and it draws a line to show how much the ground shook. Scientists use the seismograms to measure how big each earthquake is. The bigger thezigzag lines, the bigger the earthquake.

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