Different X-ray flux and kinematic parameters as a function of time for 25 Feb. 2014 event. Panel a represents, on a logarithmic scale, the soft X-ray (SXR) flux in blue in 10⁻⁷ W m⁻² on the left, and the radial speed V_R in orange with units in km s⁻¹ on the right. Panel b represents, on a linear scale, to the left, the hard X-ray (HXR) flux in purple in counts s⁻¹ and the soft X-ray derivative (dSXR/dt) flux in green in 10⁻⁶ W m⁻² s⁻¹. On the right: radial shock wave acceleration, A_R, in km s⁻² with the red line.