Fig. 2.
Example of CH extraction using CATCH from June 3, 2016: SDO/AIA 193 Å. The area of the CH is outlined by a red line showing the boundary obtained using a threshold of 44% of the median intensity of the solar disk. The yellow cross denotes the CH center of mass, and the horizontal and vertical edges of the light blue shaded box respectively give the maximum longitudinal and latitudinal extent.
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