Zhang Heng, a Chinese astronomer, mathematician, inventor, geographer, cartographer, artist, poet, statesman, and literary scholar was from Nanyang, Henan, and probably invented his primitive instrument there. Links can be found below for more information.
china
Perhaps the earliest seismograph was invented in China A.D. 136 by a m an named Choko.
It was invented in china in ancient tokyo by your mother
It was created during the Han Dynasty in China....
when zhang heng who seismograph invented it now people now when a earthquakes
At least three. China, America, and Japan.
China
the seismograph was invented in Chicago, 1800.
The first seismograph was invented by Zhang Heng in 132. The modern seismograph was invented by John Milne, Thomas Gray, and James Alfred Ewing in 1880.
1898
John
Tangyan