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