Who invented the first Seisometer/Seismograph? - ProProfs Discuss
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Who invented the first Seisometer/Seismograph?



A. Zhang Heng
B. Your mom
C. Johnney Appleseed
D. Albert Einstein
E. Bill Fendo
Asked by Fleming, Last updated: Apr 23, 2018

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Volcanoes and Earthquakes

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2 Answers

h.Jennifer

H.Jennifer

Answered on Apr 23, 2018

What's more, no, we can't predict earthquakes yet. You may be amazed to discover, in any case, that the first seismometer was created in China by a Chinese space expert, and designer called Zhang Heng.

A basic seismometer, touchy to up-down motions of the Earth, resembles a weight swinging from a spring, both suspended from an edge that moves alongside any motion recognized. The relative motion between the weight (called the mass) and the edge gives a measurement of the vertical ground motion. A turning drum is joined to the casing and a pen is connected to the weight, in this way recording any ground motion in a seismogram.

Any movement of the ground moves the edge. The mass tends not to move due to its dormancy, and by estimating the movement between the edge and the mass, the motion of the ground can be resolved.

Early seismometers utilized optical levers or mechanical linkages to enhance the little motions included, recording on sediment secured paper or photographic paper. Present day instruments utilize hardware. In a few frameworks, the mass is held almost motionless with respect to the edge by an electronic negative criticism circle.

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John Smith

John Smith

Answered on Sep 08, 2016

Zhang heng-in 132 ce, zhang heng of chinas han dynasty invented the first seismoscope (by the definition above), which was called houfeng didong yi (lit. instrument for measuring the seasonal winds and the movements of the earth). the description we have, from the history of the later han dynasty, says that it was a large bronze vessel, about 2 meters in diameter; at eight points around the top were dragons heads holding bronze balls. when there was an earthquake, one of the mouths would open and drop its ball into a bronze toad at the base, making a sound and supposedly showing the direction of the earthquake. on at least one occasion, probably at the time of a large earthquake in gansu in 143 ce, the seismoscope indicated an earthquake even though one was not felt
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