15 December 2018 - Mission Day: 8415 - DOY: 349

Sequence of SOHO-EIT images showing a shock wave expanding across the solar disk from the site of the origin of a coronal mass ejection (CME), 1997 May 12. A halo CME was observed by SOHO-LASCO. EIT recorded these images in the emission lines of Fe XII near 195 A; this ion is formed at temperatures of about 1.5 million degrees. The wave front travels at speeds of ~ 300 km/s, typical of a fast mode Alfvén shock in the lower solar corona.



• European Site • US Site


Feedback & Comments: SOHO Webmaster

Last modification: January 26, 2018

SOHO is a project of international cooperation between