Seismoscope
Copper seismometer invented by the Later Han dynasty inventory, Zhang Heng. When a tremor occurs, the ball on the opposite side of the seismic center falls. It has even picked up earthquakes from around 1000km away.
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Seismoscope
Copper seismometer invented by the Later Han dynasty inventory, Zhang Heng. When a tremor occurs, the ball on the opposite side of the seismic center falls. It has even picked up earthquakes from around 1000km away.
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