Body‐wave magnitude mb is usually considered a poor proxy of moment magnitude Mw because it saturates for moderate and large earthquakes (Mw>5.5–6) and generally shows a poor correlation with Mw. On the other hand, the observed distribution of data at the global scale also seems to indicate an inverse saturation at low magnitudes (Mw<4.5–5.0) in which Mw appears to be almost uncorrelated with mb. We show here that the latter is an artifact of the incompleteness of the global Mw datasets for Mw<4.5–5.0 and...

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