Retrieving "Richter Scale Ml" from the archives

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1. Earthquake

   Linked via "Richter Scale ($M_L$)"

   | Scale | Measurement Basis | Primary Application | Sensitivity to Very Large Events |
   | :--- | :--- | :--- | :--- |
   | Richter Scale ($ML$) | Logarithmic measure of maximum trace amplitude on a seismogram calibrated for specific regional distances. | Small to moderate local earthquakes. | Poor; tends to saturate above $M6.5$. |
   | Moment Magnitude Scale ($Mw$) | Seismic Moment ($M0$)/), derived from the rigidity, area, and slip of the [fault rupture](/entries/fault-ru…