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- Zhang’s theory described air as the main cause of earthquakes and not the interaction of tectonic plates. For him, air seeps through narrow cracks underneath and is compressed. When the stress is released, the ground starts to shake as the trapped air struggles to move out.
tulay.ph/2017/05/25/early-chinese-seismology-zhang-heng-張衡-and-his-seismoscope/Early Chinese seismology: Zhang Heng (張衡) and his seismoscope
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These ideas influenced Zhang Heng's views on the cause of earthquakes. In 132, Zhang Heng presented to the Han court what many historians consider to be his most impressive invention, the first seismoscope.
Zhang Heng was a Chinese mathematician, astronomer, and geographer. His seismoscope for registering earthquakes was apparently cylindrical in shape, with eight dragons’ heads arranged around its upper circumference, each with a ball in its mouth.
- The Editors of Encyclopaedia Britannica
Jan 19, 2017 · Depressing the lever caused the mouth of the dragon to open, making it drop another ball held in its jaws. This then fell into a the mouth of a bronze toad placed beneath the head. So the appearance of a ball in a toad's mouth indicated the direction of an earthquake, making it both a delicate scientific instrument and a thing of beauty.
Feb 9, 2019 · In 132 CE, inventor, Imperial Historian, and Royal Astronomer Zhang Heng displayed his amazing earthquake-detection machine, or seismoscope, at the court of the Han Dynasty. Zhang's seismoscope was a giant bronze vessel, resembling a barrel almost 6 feet in diameter.
- Kallie Szczepanski
Sep 9, 2019 · According to the Book of Later Han (compiled by Fan Ye in the 5th century), Zhang Heng’s earthquake detector was able to determine the direction of an earthquake hundreds of miles away. Zhang's seismoscope was a giant bronze vessel, resembling a samovar almost 6 feet in diameter.
- Joanna Gillan
Sep 28, 2018 · Only it was created nearly 2000 years ago, before people even understood what an earthquake was. Zhang Heng lived in China during the Han dynasty, and history remembers him as a scholar in...
Nov 18, 2019 · These ideas influenced Zhang Heng’s views on the cause of earthquakes. Against the grain of earlier theories proposed by his fellow Chinese and contemporary Greeks, Zhang Heng believed that earthquakes were caused by wind and air.
