John Miline invented the first modern seismograph in 1880
A person named Zhang Heng is known to be the first to make a prototype of it. He came from China back in 132 AD.
A seismometer (or the older device called a seismograph) records the seismic waves from earth tremors.+++There is a difference there: a seismometer would simply register instant vibration; a seismograph records the vibrations with time so shows the whole picture.
Chang Heng, a Chinese scientist, invented the first seismoscope around 132 AD called the dragon jar
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seismograph
John Milne created the first modern seismograph.
John Milne invented the seismograph in Tokyo, Japan in the late 19th century. He installed the first modern seismograph at the Imperial University of Tokyo in 1880.
A seismograph was created to measure out the magnitude of earthquakes.
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.
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China
John Milne invented the first modern seismograph, but the first ones were invented by Chang Heng around 132 AD.
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seismogram
The first "modern" seismograph was invented by John Milne in 1880. However, Zhang Heng, a Chinese astronomer is also believed to have invented the seismograph; probably the primitive ones.
1898