Physical parameters of the radio source for event 2: a) shock speed, calculated from the frequency drift [df/ dt] and the plasma frequency [f_p]; b) Alfvén Mach number, calculated from the density jump at the shock front [X_n]; c) Alfvén speed, calculated from the shock speed [v_s] and the Alfvén Mach number [M_A]; and d) magnetic field strength, calculated from the electron number density [n_e] and the Alfvén speed [v_A]. The values were determined with respect to the lower frequencies of the fundamental lane of the radio emission.