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We examine the question of a possible difference in the frequency-size statistics of intraplate earthquakes, as opposed to their more numerous interplate counterparts. We use both the Harvard Centroid Moment Tensor catalogue and the data set of the National Earthquake Information Center. In the former case, we quantify earthquakes through their seismic moment and describe their population distribution through the β-value introduced by Molnar. In the latter case, we use traditional b-values computed from both body-wave magnitudes (mb) and surface-wave magnitudes (Ms). We conclude that both β- and b-values for true intraplate...

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