Seismometers. For information on how seismometers are used, please see the related question.
seismic waves
A seismometer (replacing the outdated term seismograph), but other instruments may also respond to an earthquake. The simplest example of a seismograph is a pendulum.
seismograph scale
Seismic waves are measured by seismographs, geophones, hydrophones and accelerometers.
China
The seismograph was important to ancient china because it could detect an earthquake and warn people so they could escape.
china
Perhaps the earliest seismograph was invented in China A.D. 136 by a m an named Choko.
It was originated in China in the Han Dynasty.
It was invented in china in ancient tokyo by your mother
It was created during the Han Dynasty in China....
Seismometers. For information on how seismometers are used, please see the related question.
seismic waves
Seismograph
seismograph
during an earthquake