Authors: Nat Gopalswamy
Affiliation: NASA Goddard Space Flight Center
A combination of long-wavelength radio and white light data has demonstrated that collision between coronal mass ejections is a violent process resulting in particle acceleration. Collision between CMEs can be directly observed within the SOHO field of view and are inferred from other observations at larger distances from the Sun. After a brief overview with specific examples, I will discuss various consequences of CME collision in the inner heliosphere. In particular, I will discuss the influence of CME collision on the intensity of energetic electron and ion populations at 1 AU, and on the propagation of geoeffective CMEs. I will also discuss future prospects in the continued study of colliding CMEs.