Medvedev-Sponheuer-Kárník scale

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The MSK scale ( Medvedev-Sponheuer-Karnik scale ) indicates the intensity of an earthquake in twelve degrees of strength. It was developed in 1964 by Sergei Wassiljewitsch Medwedew , Wilhelm Sponheuer and Vít Kárník on the basis of the Modified Mercalli scale and the Medvedev scale (later GEOFIAN scale ).

In contrast to magnitude scales , such as the well-known Richter scale , an intensity scale describes the effects of an earthquake on the landscape, streets or buildings that can be perceived without instruments ( macro-seismics ). Depending on the local conditions, a single earthquake classified according to such a scale can have different strengths in different places. Examples of other intensity scales include the JMA scale , the European Macroseismic Scale (EMS scale) or the Rossi-Forel scale .

MSK scale
Degree of strength observation
I. only earthquakes measuring instruments ( seismographs registered)
II only occasionally felt by resting people
III only felt by a few people
IV felt by many people; Clink dishes and windows
V many sleepers wake up; commute hanging objects
VI slight plaster damage to buildings
VII Cracks in the plaster, walls and chimneys
VIII large cracks in the brickwork, gable parts and roof cornices collapse
IX walls and roofs collapse on some buildings; there are landslides observed
X Collapse of many buildings; Crevices in the ground
XI numerous crevices in the ground; Landslides in the mountains
XII strong changes on the earth's surface

See also