Number of 1-mm particles satisfying the MOID criteria from each ejection epoch with different ranges of ejection epoch (top: 10 000–30 000 yr ago, bottom: 2000–10000 yr ago). Different colors respectively represent the MOID criteria of Earth radius (darker color) and Earth-Moon distance (lighter color). The dotted line shows the mean-averaged values of the number of particles with MOIDs within Earth’s radius from nominal and clone parent bodies. The solid line is the equivalent of the dotted line for the Earth-Moon distance criterion. Simulation results with no particles within the MOID criteria are not present, but they were included when calculating the mean average.