  We have analyzed a set of 25 interacting events which are associated with the
DH type II bursts. These events are selected from the Coronal Mass Ejections
observed during the period 1997-2010 in SOHO/LASCO and DH type IIs in
Wind/WAVES. Their pre and primary CMEs from nearby active regions are
identified using LASCO and EIT images and their height-time diagrams. Their
interacting time and height are obtained, and their associated activities, such
as, flares and solar energetic particles (>10pfu) are also investigated.
Results from the analysis are: primary CMEs are much faster than the pre-CMEs,
their X-ray flares are also stronger (X and M class) compared to the flares (C
and M class) of pre-CMEs. Most of the events occurred during the period
2000-2006. From the observed width and speed of pre and primary CMEs, the
pre-CMEs are found to be less energetic than the primary CMEs. While the
primary CMEs are tracked up to the end of LASCO field of view, most of the
pre-CMEs are tracked up to < 26Rs. The SEP intensity is found to be related
with the integrated flux of the X-ray flares associated with the primary CMEs
for nine events originating from the western region.
