Fig. 4.

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Time-elongation maps (J-maps) for STEREO-A (left) and STEREO-B (right) constructed from running differences images from HI1 and HI2, for the time interval from 06 October 2010 to 11 October 12:00 UT, 2010. Two features (marked as Feature 1 and Feature 2, with red and blue lines, respectively) are tracked corresponding to enhanced density features.
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