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Earthquake intensity scales

(denoted I) - a measure of the value of the ground shaking, determines the degree of destruction of the buildings built by people, the nature of the changes in the earth's surface (cracks, moats, subsidence, etc.) and data on the feelings experienced by people. We estimate the number of points:

The intensity on a scale

Description of typical observed effects

1÷4

Do not cause the destruction of the quake.

5÷7

Destroyed dilapidated buildings.

8

Fall smokestacks, solid buildings partially destroyed.

9

Destroyed most of the buildings, there are significant cracks on the surface of the Earth.

10

Destroyed bridges, pipelines and landslides.

11

Destruction of all structures, changes in the landscape

12

Large changes in the terrain over a wide area.

 

 

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