Doppler maps of the Hβ (top row) and He I λ 5876 (bottom row) lines. From left to right the different maps correspond to the pre-eruption, eruption, and post-eruption epochs. The contours correspond to 95 (magenta), 80 (blue), 70 (cyan), 60 (green), 50 (yellow), and 40% (red) of the value of the highest peak in the map. No correction for the photospheric absorption component was applied.