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Table 1.

Parameters for the CACTus detections of the CME in coronagraph data from the SOHO and STEREO spacecraft. Data reproduced from For all three detections, the angular width was larger than 90°, and thus the CME was classified as a type II halo CME.

Coronagraph Earliest detection time (UT) Angular width (°) Median velocity (km s−1) Principal angle (°)
STEREO-B/COR2 2010/08/14 10:24 118 (II) 641 ± 221 274
SOHO/LASCO 2010/08/14 10:12 152 (II) 657 ± 22 279
STEREO-A/COR2 2010/08/14 09:54 114 (II) 568 ± 184 82

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