“…The absence of similar earthquake clusters elsewhere on the Island suggests that Wrangellia, the terrane that comprises most of Vancouver Island, is a relatively coherent crustal block in which brittle deformation is primarily manifest in larger, isolated events like those in 1918, 1946, and 1957(Rogers, 1983Cassidy et al, 1988). Notable earthquake concentrations adjacent to Vancouver Island include the Texada intraplate earthquake nest (Merrill & Bostock, 2019), the San Juan Island cluster (Balfour et al, 2012), seismicity in the upper Fraser Valley (Balfour et al, 2012), and shallow events within the Georgia Strait (Cassidy et al, 2000). Whereas those earthquake sequences have been previously documented, our study affords structural constraints for several minor earthquake clusters on the west coast of Vancouver Island near the town of Ucluelet.…”