Understanding Earthquake Magnitude and Intensity
Learn about earthquake magnitude, intensity, and their effects on locations, buildings, and observers. Explore the Mercalli scale, Richter scale, and more.
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Presentation Transcript
Strength Earthquake 1-intensity is the oldest measurement of earthquake magnitude and is a qualitative) description of the effect of the earthquake on the location of the image effect size observation. Left by the earthquake and on the reactions of the people at that site. The effect of the earthquake is mainly the strength of the earthquake and the positional conditions of the site And according to the building system adopted in the area where the earthquake occurred The Mercalli scale 1-12 is the most widely used earthquake intensity scale
Intensity How Strong Earthquake Feels to Observer Depends On: Distance to Quake Geology Type of Building Observer! Varies from Place to Place
2- Magnitudewhich is related to observing the effects and results of an particular place, (symbolized by M) is calculated Starting from the amplitude or duration of seismic waves of specific frequency generated by the earthquake and recorded by a seismograph. The M is calculated from different types of seismic waves, taking into account various factors such as the dimension of the surface center For earthquake, depth of focus, frequency of vibration, type of seismograph used..etc. Various values of intensity can be calculated, the most famous of which is 1-Richter local M L 2-Surface wave M S 3-Body waves M B MW 4-the moment earthquake in a 4
