Since 2005 the International Association of Seismology and Physics of the Earth's Interior (IASPEI) has standardized the measurement procedures and equations for the principal magnitude scales, ML , Ms , mb , mB  and mbLg .
Vuodesta 2005 lähtien International Association of Seismology and Physics of the Earth's Interior (IASPEI) on standardoinut tärkeimmät magnitudiasteikot, ML, Ms, mb, mB ja mbLg.