25 May 2024 - Mission Day: 10403 - DOY: 146

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.



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Last modification: July 27, 2020

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