Vít Kárník

Vít Kárník (5 October 1926 in Prague – 31 January 1994 in Prague) was a Czech geophysicist and seismologist. He and Wilhem Sponheuer developed the Medvedev–Sponheuer–Karnik scale (MSK-scale) for measurement of intensity of earthquakes with Sergei Medvelev and in scale described magnitude of epicentric points.

Moscow-Prague formula

 * $$M_\mathrm{S} = \log_{10}\left({A \over T}\right)_{\max} + \sigma\left(\Delta\right) = \log_{10}\left({A \over T}\right)_{\max} + 1{,}66 \log_{10}\Delta + 3{,}3$$

max. depth 50Km