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 .
|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|