01/08/2014-01/09/2014

Comment Section

• This event has been included because it has a very strong Halo CME entering LASCO around 17:48 UT on the 7th, but presents no obvious in-situ signatures at L1. (Hess)

This is thus a “problem” event and is being studied for an AGU session. N. Gopalswamy reports that the January 6 and 7 CMEs are quite intriguing. The Jan. 6 event produced a GLE even though it had a speed <2000 km/s and originated behind the west limb (Thakur et al., ApJ, 2014). The Jan. 7 CME was near disk center and ultrafast (~3000 km/s), but was likely deflected to the south and west so it was not geoefffective although it was a large SEP event. It was also not a GLE. (D. Webb)

References

- Thakur et al., ApJ, 790, L13, DOI http://dx.doi.org/10.1088/2041-8205/790/1/L13 (2014).

- Webb, D., An Overview of the 7 January 2014 X-Class Flare-CME and Space Weather Predictions, AGU SH51E-01, 2014.

- Moestl et al., Nat. Commun., 6, 7135, 2015.

- Gopalswamy et al., EP&S, 66, 104, 2014.

- Wang, R., Liu, Y. D., Dai, X., Yang, Z., Huang, C., and Hu, H., The role of active region coronal magnetic field in determining coronal mass ejection propagation direction, 2015, Astrophys. J., 814, 80 (http://iopscience.iop.org/article/10.1088/0004-637X/814/1/80/pdf)

- Mays, M.L., B. J. Thompson, L. K. Jian, R. C. Colaninno, D. Odstrcil, C. Möstl, M. Temmer, N. P. Savani, G. Collinson, A. Taktakishvili, P. J. MacNeice , and Y. Zheng, Propagation of the 2014 January 7 CME and Resulting Geomagnetic Non-Event, Astrophys. J, 812, 145, 2015