Maps in (r, ϕ) coordinates of parameter statistics drawn from latitudinal arcs θ_L3, min < θ < θ_L3, max for the a = 0.9 case at two epochs: t = 19 594M (upper row of panels) and t = 19 630M (lower row of panels). From the left, the panels show (1) mean density ρ_mean in log scale, (2) maximum temperature T_max in log scale, and (3) minimum radial velocity v_min^r. The black circles mark the BH with horizon radius r_H ≃ 1.436M, the gray dashed circles mark the θ = 90° ergosphere boundary r_E = 2M, the gray dashed lines in the upper panels mark the cutout ϕ sector in Figs. 6 and 7, and the black dashed lines mark the ϕ values for the (r, θ) maps presented in Fig. 4.