03 December 2023 - Mission Day: 10229 - DOY: 337

Large coronal mass ejection (CME) from 6 November 1997, which originated from the site of a X-9.4 flare, approximately 30 degrees off the west limb. The image shown is a composite of an EIT Fe XII 195 EUV image of the Sun (at 14:19 UT), and three images of the LASCO experiment onboard SOHO, consisting of 3 nested coronagraphs (field of view: C1: 2 solar radii, C2: 6 solar radii; C3: 32 solar radii). The image of the most inner part (LASCO C1) was taken at 14:32 UT, the middle image covering the region from 2 to 6 solar radii (LASCO C2) was taken at 14:26 UT, and the outer image covering the sky from 6 to 32 solar radii (LASCO C3) was taken at 14:12 UT. At 12:10 UT a magnetic flux rope CME emerged from behind the C2 occulter with a velocity of 1500 km/s. At 12:41 UT the CME has expanded into the C3 field of view. At 13:46 UT the middle part of the CME has become a large, diffuse cloud with a dark hole in the center. The two legs, which are still connected to the solar surface have been deflected away to the north and south. At the west limb the dark structure in the equatorial plane is caused by the blow-out of material out of the equatorial streamer. High energetic (E>100 MeV) protons accelerated at the site of the flare arrivedat the location of SOHO at 13:46 UT and caused numerous bright points and streaks in the images. Courtesy SOHO/LASCO consortium.



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Last modification: July 27, 2020

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