Ma, S., M. J. Wills-Davey, J. Lin, P. F. Chen, G. D. R. Attrill, H. Chen, S. Zhao, Q. Li, and L. Golub, A New View of Coronal Waves from STEREO, ApJ, 707, 503-509 (2009) (ADS)
(click on the image for a larger version)
Date: 2010 October 01
Update: 2010 November 26
Solar flares often emit global waves, and these are crucial to our understanding of the large-scale dynamics even though they do not appear in many of our cartoons. But in spite of this good reason to have this cartoon in the Archive, it is here mainly because it is so colorful. It shows how one might interpret the stereoscopic views of a global wave that our new multi-perspective data provide. EUVI B, EIT, and EUVI A are the three EUV-imaging spacecraft here.
The physics of these global waves has to do with their nature: they could be blast waves, launched by the flare restructuring. Or, they could be bow waves, driven by the CME. Or, they could be something else. The paper here is based on a study of the single event SOL2007-12-07 and did not come to any conclusions about this basic matter.