Figure 2: Solar source and evolution of the 23 July 2012 event viewed from three vantage points. | Nature Communications

Figure 2: Solar source and evolution of the 23 July 2012 event viewed from three vantage points.

From: Observations of an extreme storm in interplanetary space caused by successive coronal mass ejections

Figure 2

(a–c) Composite images of EUVI at 304 Å and COR1 aboard STEREO B, showing two consecutive prominence eruptions (E1 and E2) and corresponding nascent CMEs (CME1 and CME2). (d–i) Images from COR2 of STEREO B, COR2 of STEREO A and LASCO of SOHO, respectively. Note a transition layer ahead of the front of the merged CMEs in COR2 of STEREO B, reminiscent of a shock signature. The white circle marks the location and size of the solar disk. See also Supplementary Movies 1–3.

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