Solar wind plasma and magnetic field parameters detected at Wind (a) and STEREO-A (b) spacecraft. (a) From top to bottom, the panels show the proton density, bulk speed, proton temperature (the dotted curve denotes the expected proton temperature from the observed speed), magnetic field strength, proton β, magnetic field components, and D_st index. (b) Same as (a), but without the D_st index. The yellow and blue shaded regions indicate the intervals of the two ejecta, and the blue vertical dashed lines mark the associated shocks.