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sci.seismic-magnitude-richter Calculator
Calculates Richter local magnitude ML = log A − log A₀(Δ) from seismograph amplitude A and distance correction A₀. Each unit of magnitude increase represents 10× amplitude and 31.6× energy — the Richter scale has been replaced by moment magnitude Mw for large earthquakes (M > 6).
Inputs
A Mm
Maximum displacement from equilibrium. Energy carried by a wave is proportional to amplitude squared.
Dist Km
Separation between two points or total path length. Check that units are consistent throughout the calculation.
Results
local magnitude ML (Richter)
Sample size or count used in the calculation.
energy release (J)
Sample size or count used in the calculation.
TNT equivalent (tonnes)
Sample size or count used in the calculation.
ML = log₁₀(A) + B(Δ)
Reference formula or conversion factor shown for context.