who invented the earlist instrument to tell people where earthquakes happened

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who invented the earlist instrument to tell people where earthquakes happened
who invented the earlist instrument to tell people where earthquakes happened

who invented the earlist instrument to tell people where earthquakes happened
发明了最早的可以预报地震的仪器的人
张衡

您好!
谁最早发明了能预测地震的机器来告诉人们(地震即将到来)。
who invented the earlist instrument to tell people where earthquakes happened.