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This paper relates landslide inventories to erosion rates and provides quantitative estimates of the landslide hazard associated with earthquakes. We do this by utilizing a three-parameter inverse-gamma distribution, which fits the frequency–area statistics of three substantially ‘complete’ landslide-event inventories. A consequence of this general distribution is that a landslide-event magnitude m_L=logN_LT can be introduced, where N_LT is the total number of landslides associated with the landslide event. Using this general distribution, landslide-event magnitudes m_L can be obtained from incomplete landslide inventories, and the total area and volume of associated landslides, as well as the area and volume of the maximum landslides, can be directly related to the landslide-event magnitude. Using estimated recurrence intervals for three landslide events and the time span for two historical inventories, we estimate …