Earthquakes do not have mass as such. Rather they have magnitude and intensity. Magnitude is the amount of energy released by the earthquake so should ultimately have units in joules.
Both earthquake magnitude and intensity can be estimated from the amplitude of seismic waves as recorded on a seismometer.
A seismograph
A seismograph is an instrument that measures and records earthquake waves.
This instrument is a balance.
An instrument that measures the shaking of the ground during an earthquake.
An instrument that measures the shaking of the ground during an earthquake.
A seismograph is an instrument used to measure movement of earthquake. It measures the seismic waves of that area.
The instrument that can measure the density of an earthquake is called an seismometer. The first seismoscope dates back to 132 AD.
It's a seismograph.
a scale
a weighing scale
a beaker
A seismograph records the intensity measured by the Ritcher Scale.