may 4, 132 - Earthquake Detector was invented
Description:
According to court records of the later Han Dynasty, a seismograph was created by the brilliant inventor Zhang Heng (78-140 AD) in132 AD. Its function is to determine the direction of an earthquake. In 138 AD, this instrument indicated an earthquake occurring in Longxi a thousand kilometers away. It was the first time that mankind to detect an earthquake. Modern seismographs only began development in 1848 in Europe.
Added to timeline:
Date:
may 4, 132
Now
~ 1894 years ago