Earthquake Measurements
Earthquakes are measured in intensity and magnitude. Intensity is a measure of the amount of ground shaking based on observation of property damage. Magnitude is amount of energy released from an earthquakes source.
The Modified Mercalli Intensity scale is a twelve point scale that measures intensity of earthquakes. It was developed in 1912 by Giuseppe Mercalli. It ranges from I to XII. It uses California buildings as its standard.
The Richter scale is a scale that measures magnitude. It was developed in 1935 by Charles Richter. The magnitude of the Richter scale can be calculated by measuring the amplitude of the largest seismic wave.
The Moment Magnitude scale is a newer scale used to measure magnitude. It uses a different formula than the Richter scale, but the magnitude values remain similar. The Moment Magnitude scale is based on the seismic moment of an earthquake.
The Modified Mercalli Intensity scale is a twelve point scale that measures intensity of earthquakes. It was developed in 1912 by Giuseppe Mercalli. It ranges from I to XII. It uses California buildings as its standard.
The Richter scale is a scale that measures magnitude. It was developed in 1935 by Charles Richter. The magnitude of the Richter scale can be calculated by measuring the amplitude of the largest seismic wave.
The Moment Magnitude scale is a newer scale used to measure magnitude. It uses a different formula than the Richter scale, but the magnitude values remain similar. The Moment Magnitude scale is based on the seismic moment of an earthquake.
Source:http://earthquakenepal2015.weebly.com/the-richter-scale-and-modified-mercalli-intensity-scale.html Source: http://www.sms-tsunami-warning.com/pages/richter-scale#.WH-7ALGZNjQ