Fig. 4

Cumulative size–frequency distributions of particles inside the SCI crater (red curve) and outside the SCI crater (blue curve). The distribution of particles inside the crater is the sum of the distributions of particles in Regions 03 − 08, as shown in Fig. 3b. The distribution of particles outside the crater is the sum of the distributions of 1.0R–3.0R shown in Fig. 2a. The slopes of the distribution of particles at sizes larger than 0.5 m and between 0.1 m and 0.5 m are − 2.45 and − 1.75, respectively