The non-indigenous emerald ash borer (Agrilus planipennis Fairmaire) (Coleoptera: Buprestidae) is an Asian beetle that feeds on ash (Fraxinus spp.) trees. Emerald ash borer was discovered in southeastern Michigan in 2002 and has subsequently been found to be responsible for the death or decline of several million ash trees. Earlier research efforts have suggested that initial emerald ash borer attacks may occur in the upper canopy several years before the presence of emerald ash borer is detected on the lower tree bole. We examined within-tree spread of emerald ash borer on green ash (Fraxinus pennsylvanica Marsh.) in southeastern Michigan. Samples were collected from several emerald ash borer-killed green ash trees at regular intervals, from the upper canopy branches to the bases of the trees. Within-tree temporal and spatial dynamics of emerald ash borer were reconstructed using dendrochronological analyses.