G1 (Minor) Geomagnetic Storms Likely on 24-25 October 2015

A long-duration C4 flare from AR 12434 on 22 Oct produced an Earth-directed coronal mass ejection (CME) which forecasters anticipate to arrive late on 24 Oct.  The passage of the CME is likely to cause periods of G1 (Minor) geomagnetic storms late on 24 Oct through early 25 Oct.