| SOHO/LASCO
Halo CME 20100117 |
| Subject: SOHO/LASCO Partial HALO CME 100117 -BACKSIDED UCMEO 93001 00117 1750/ 00117 60419 91415 3372/ 270// 232// 40603 00117 60413 80526 24390 ////// 5222/ 99999 PLAIN SOHO/LASCO C2 observed an asymmetric loop front at PA 115 degrees over the southeast quadrant on January 17, 2010 04:19 UT. By 05:28 UT a possible 2nd event starts northward of the beginning position near PA 75 degrees. This emission seems to cause a collision. The width of this event spans position angle range of 337-270 degrees for a total 293 degrees. The leading edge leaves the C2 field of view by 06:06 UT. The event continues into the C3 field and measured in the last frame at the time of this writing of 14:15 UT. Time/height measurements were marked and calculated to velocities of this event in he C2 field of 602.9 Km/sec at position angle 95 degrees. It slows into the C3 field and averages till 14:15 UT to 283.4 km/sec at the same position. The event is seen in EIT as a BACKSIDED limb CME beginning at 04:13 UT at PA 127 degrees. Material is seen in range of PA 30-188 degrees. At approximately 48 degrees a slower system over the limb is seen in difference images. This may be an eruptive prominence but is activated in the same frame and are most likely related. LASCO and EIT images, movies and time/height information for this event is available on the web at: http://umbra.nascom.nasa.gov/lasco/observations/halo/2010/100117/ Best regards, Kevin Schenk SOHO Mission EIT and LASCO Operations NASA-Goddard Space Flight Center, USA BT |
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SOHO/LASCO C3 Diff |
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SOHO/LASCO C2 Diff |
SOHO/EIT 195A Diff |
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