Ancient way of China helped detect quakes
Ancient way of China helped detect quakes Only between January and May, 2015, 44 over 6. 0magnitude earthquakes have occurred. Through history, earthquakes have both fascinated and worried humanity, leading to the quest for methods to measure their intensity and direction. In the year 132 AD, during China s Han Dynasty, Chinese astronomer Zhang Hengdeveloped the first seismograph. The instrument was made of a bronze jar and 8 dragons welded onto the jar s body. Between its jaws, each dragon had a
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