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No, the pen on a seismograph does not swing freely. The pen is stationery only until an earthquake occurs. Then the pen moves along the paper according to the way the ground is moving or quaking.

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Sister Little

Lvl 13
2y ago
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Wiki User

12y ago

yes that's y they can record the ground shaking

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Wiki User

9y ago

true

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Q: Do the pens on seismographs swing freely?
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