Seismologists estimate earthquake intensity based on the reports of witnesses on the level of felt ground movement, on the amount of damage caused by an earthquake and also based on the ground accelerations as measured by seismometers.
The scale used to define earthquake intensity in much of the world is the Modified Mercalli scale (before this, a scale known as the Rossi-Forel scale was used). In Europe the Macroseismic scale is in use.
Seismometers are most commonly used to record the intensity of earthquakes. These instruments detect and measure the seismic waves produced by earthquakes. The data collected from seismometers helps scientists determine the magnitude and location of the earthquake.
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Richter scale is used to measure earthquakes magnitude Shake intensity is measured on the Mercalli scale
Seismometer
Seismometers are devices used to detect and measure the intensity and magnitude of earthquakes. They work by recording the ground motion caused by seismic waves, which allows seismologists to analyze the data and determine the earthquake's magnitude and intensity.
The Richter Scale is used to measure the intensity of earthquakes.
Mercalli and Richter scales
It depends on what substance/object you are trying to determine the intensity.
Mercalli and Richter scales
No machine is used. The intensity of a tornado is determined by a visual survey of the damage.
To measure earthquakes, you need seismometers, devices that detect and record seismic waves caused by earthquakes. These seismometers are typically placed in various locations to accurately measure the magnitude and intensity of the shaking. The data collected from these instruments is then used to determine the earthquake's location, depth, and magnitude.
The Richter scale measures the magnitude of an earthquake, which is the amount of energy released at the source. It does not measure the intensity or effects of the earthquake at different locations. It is commonly used to compare the size of earthquakes.