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J. F. Gallimore (Bucknell University), R. Cool (University of Wyoming), M. D. Thornley (Bucknell University)
Torrelles and collaborators (2001) observed water masers in the star forming region Ceph A HW2 with the VLBA, which revealed linear and arcuate structures and rapid proper motions. We observed the same region using the MERLIN telescope; the VLBA and MERLIN observing epochs are separated by 4 years. We present an analysis of the proper motions and the evolution of the water maser structures.