Magnetic hodographs and Walén plots for CS0 (07:45:50–07:46:20 UT), CS1 (07:46:35–07:46:43 UT), and CS2 (07:48:15–07:48:45 UT) in Event 1. Time progression in the hodographs is represented by the colour of the dots, with earlier times in blue and later times in red. The red, green, and blue dots in the Walén plots represent the R, T, and N-components of the Alfvén velocity v_A and the HT frame bulk plasma velocity v_p − v_HT. a) lm-plane hodograph for CS0. b) ln-plane hodograph for CS0. c) lm-plane hodograph for CS1 and CS2. d) ln-plane hodograph for CS1 and CS2. e) Walén plot for CS0. f) Walén plot for CS1. g) Walén plot for CS2.