Origin of two extreme solar particle events Mishev, A. ; Kocharov, L. ; Pohjolainen, S. ; Reiner, M. J. ; Lee, J. ; Laitinen, T. ; Didkovsky, L. V. ; Pizzo, V. J. ; Kim, R. ; Klassen, A. ; Karlicky, M. ; Choj, K. S. ; Kovaltsov, G. A. ; Usoskin, I. G. ; Valtonen, E. ; Vainio, R. Abstract Publication: 35th International Cosmic Ray Conference (ICRC2017) Pub Date: July 2017 DOI: 10.22323/1.301.0146 Bibcode: 2017ICRC...35..146M