when was the seismograph invented in ancient china
In 132
title: Seismometer text: "seismograph" might be used in a more general sense. For example, a monitoring station that tracks changes in electromagnetic noise affecting amateur radio waves presents an "rf seismograph". And Helioseismology studies the "quakes" on the Sun. The first seismometer was made in China during the 2nd Century. The first Western description of the device comes from the French physicist and priest Jean de Hautefeuille in 1703. The modern seismometer was developed in the 19th century. In AD 132, Zhang Heng of China's Han dynasty invented the first seismoscope (by the definition above), which was called "Houfeng Didong Yi" (translated as, title: History of science and technology in China text: History of science and technology in China Ancient Chinese scientists and engineers made significant scientific innovations, findings and technological advances across various scientific disciplines including the natural sciences, engineering, medicine, military technology, mathematics, geology and astronomy. Among the earliest inventions were the abacus, the "shadow clock," and the first items such as Kongming lanterns. The "Four Great Inventions,"the compass, gunpowder, papermaking, and printing – were among the most important technological advances, only known to Europe by the end of the Middle Ages 1000 years later. The Tang Dynasty (AD 618–906) in particular was a time of great innovation. A good title: History of science and technology in China text: mainstream weapon in Europe. Several remains of crossbows have been found among the soldiers of the Terracotta Army in the tomb of Qin Shi Huang. The Eastern Han Dynasty scholar and astronomer Zhang Heng (78–139 AD) invented the first water-powered rotating armillary sphere (the first armillary sphere having been invented by the Greek Eratosthenes), and catalogued 2,500 stars and over 100 constellations. In 132, he invented the first seismological detector, called the ""Houfeng Didong Yi"" ("Instrument for inquiring into the wind and the shaking of the earth"). According to the "History of Later Han Dynasty" (25–220 AD), this seismograph was title: History of science and technology in China text: whether authorship is split among authors). History of science and technology in China Ancient Chinese scientists and engineers made significant scientific innovations, findings and technological advances across various scientific disciplines including the natural sciences, engineering, medicine, military technology, mathematics, geology and astronomy. Among the earliest inventions were the abacus, the "shadow clock," and the first items such as Kongming lanterns. The "Four Great Inventions,"the compass, gunpowder, papermaking, and printing – were among the most important technological advances, only known to Europe by the end of the Middle Ages 1000 years later. The Tang Dynasty (AD 618–906) in particular was a title: Chinese exploration text: History of the Song Dynasty, and Islam during the Song Dynasty." In China, the invention of the stern-mounted rudder appeared as early as the 1st century AD, allowing for better steering than using the power of oarsmen. The Cao Wei Kingdom engineer and inventor Ma Jun (c. 200–265 AD) built the first south-pointing chariot, a complex mechanical device that incorporated a differential gear in order to navigate on land, and (as one 6th century text alludes) by sea as well. Much later the Chinese polymath scientist Shen Kuo (1031–1095 AD) was the first to describe the magnetic needle-compass, along with