Who invented the seismograph and when?

1.	Who invented the seismograph and when?
Answer» ANSWER: Chang Heng 132 A.D. Explanation: The FIRST seismograph was invented in 132 A.D. by the CHINESE astronomer and mathematician Chang Heng. He called it an "earthquake weathercock." Each of the eight dragons had a bronze BALL in its mouth. pls MARK me as the brainlist...

Answer»

Chang Heng

132 A.D.

Explanation:

The FIRST seismograph was invented in 132 A.D. by the CHINESE astronomer and mathematician Chang Heng. He called it an "earthquake weathercock." Each of the eight dragons had a bronze BALL in its mouth.

pls MARK me as the brainlist...

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Who invented the seismograph and when?​