Fig. 3
Top row: Hα (left, right) and EIT (middle) images showing the wave event of 1997 Sep. 24. Shown are difference images from which a pre-event frame has been subtracted. The Hα frames were obtained in the red line wing, and the EIT image at 195 Å. The times of the Hα images are only approximate. Bottom row: 17 GHz difference images corresponding in time to the images in the top row.
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