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However, since the Energy Magnitude and Moment Magnitude measure two different properties of the earthquake, their values are not the same. The energy release can also be roughly estimated by converting the moment magnitude, M w , to energy using the equation log E = 5.24 + 1.44M w , where M w is the moment magnitude.
Earthquake - Magnitude, Intensity, Effects: The violence of seismic shaking varies considerably over a single affected area. Because the entire range of observed effects is not capable of simple quantitative definition, the strength of the shaking is commonly estimated by reference to intensity scales that describe the effects in qualitative terms.
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Two different viewpoints underpin the most important measurements related to earthquakes: magnitude and intensity. To scientists, an earthquake is an event inside the earth. To the rest of us, it is an extraordinary movement of the ground. Magnitude measures the former, while intensity measures the latter.
In conclusion, earthquake magnitude and intensity are two essential measures that provide distinct perspectives on seismic events. While magnitude gauges the earthquake's size and energy release at its source, intensity describes the shaking experienced at specific locations. Both measures play crucial roles in understanding and characterizing ...
Magnitude measures the energy released at the source of the earthquake. Magnitude is determined from measurements on seismographs. Intensity measures the strength of shaking produced by the earthquake at a certain location. Intensity is determined from effects on people, human structures, and the natural environment.
Earthquake Intensity Database. 1638 - 1985. Download Database (MS Excel format; 15MB) Earthquake intensities are numerical values assigned to the effects of earthquakes on people and their works, and on the natural environment. Intensities are evaluated using the Modified Mercalli Intensity Scale of 1931, which contains levels of effects ...