The Solar Event on 20 January 2005 observed with the Tibet YBJ Neutron monitor observatory

H. Miyasaka, E. Takahashi, S. Shimoda, Y. Yamada, I. Kondo , H. Tsuchiya, K. Makishima, F. R. Zhu, Y. H. Tan, H. B. Hu, Y. Q. Tang , J. Clem and YBJ NM collaboration. (a) Caltech, Pasadena, CA 91125, USA (b) RIKEN, Wako, Saitama 351-0198, Japan (c) Institute of High Energy Physics, Beijing 100049, China (d) China Meteorological Administration, Beijing 100049, China (e) University of Delaware, Newark, DE 19716, USA Presenter: H. Miyasaka (miyasaka@srl.caltech.edu), usa-miyasaka-H-abs2-sh15-poster