I think it's a seismograph.
It may have been the Chinese inventor's Zhang Heng's seismoscope .
Used to measure earthquake activity with sound waves.
We can't yet tell the exact time a deadly earthquake will strike. We can make educated guesses based on an increase or decrease in seismic activity over time.
A Richter Scale is used to measure Earthquakes and the power of earthquakes. The number used is ten times greater in force than the one before it, so a 7.0 Earthquake is ten times more powerful than a 6.0, for example.
The "Dragon Jar" was invented by Zhang Heng, an inventer of Han Dynasty more than 1000 years ago. It could measure if an earthquake occurred and in which direction.
Geologists use seismographs. They try to see when an earthquake is going to occur.
Seismagraph
A seismograph.
A Seismograph
seismogram
Richtor scales
The Richter Scale is used to rate earthquakes.
A seismometer, or seismograph. One of the two! :)
A seismograph is an instrument used to measure movement of earthquake. It measures the seismic waves of that area.
An earthquake instrument is a device or tool used to measure and detect the different parameters associated with earthquakes, such as magnitude, intensity, and frequency. Some common earthquake instruments include seismometers, accelerometers, and tiltmeters, which help scientists monitor and study seismic activity.
A seismoscope is an instrument used to measure vibrations of the earth's crust. Generally, scientists use these readings to predict when an earthquake will strike. They can also use this to measure the length and magnitude of an earthquake.
A seismograph is the instrument used for recording the intensity and duration of an earthquake. It detects and measures the motion and vibrations of the ground caused by seismic waves.