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3 results for “richter”

Formulae (3)

M = \log_{10}\frac{A}{A_0}

Earthquake magnitude from seismograph amplitude.

\log_{10} E = 4.8 + 1.5\,M

Energy released by a quake of Richter magnitude M.

\log_{10}E = 4.8 + 1.5M

Approximate energy released by an earthquake.