Correlation coefficient m aps obtained for May and June 2001 (solar maximum, top panels) and for March and April 2008 (solar minimum, bottom panels). In all panels the horizontal axis corresponds to the polar angle ϕ in degrees, and the vertical axis is the heliocentric distance r in the R_⊙ units. The colors represent the value of the Pearson’s correlation coefficient ρ_B, pB which ranges between 0 and 1.