STEREO - Solar Terrestrial Relations Observatory
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Important notice about STEREO Behind

Five Days/ Eight CMEs


The dynamism of the Sun was readily apparent for five days in the past week: it blasted at least eight substantial coronal mass ejections (CMEs) into space in all different directions (Mar. 20-24, 2014). The last one was the most curious. The particle cloud rose and expanded directly above the top of the Sun looking a lot like a smoke ring. In these coronagraph images from STEREO (Behind), the Sun (represented by the white circle) is blocked by a black occulting disk so that we can see faint features in the corona. The Sun is near its peak level activity in its 11 year solar cycle.

Last Revised: March 19, 2018 15:00:39 UTC
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