Coronal mass ejections observed on 22 May 2013 from Earth and STEREO-A. (a) The CMEs observed on 22 May 2013 from Earth’s perspective in a composite image from SWAP 174 Å, LASCO/C2, and LASCO/C3. The CME associated with the radio emission in Fig. 2 can be seen in the LASCO/C2 field of view (inner), while the earlier CME has expanded higher up in the corona and can be seen in the LASCO/C3 field of view (outer). (b) The CMEs observed on 22 May 2013 from STEREO-A’s perspective in a composite image from EUVI-A 195 Å, COR1-A, and COR2-A. The main CME is visible in the COR1-A field of view (inner), while the earlier CME is visible in the COR2-A field of view (outer). The middle inset in the figure shows the propagation direction of the CME and the location of Earth and the STEREO spacecraft with respect to the Sun.