 The West Blanco Depression is shallow in the south, reaching only a depth of 3400 m, but quickly reaches depth near the Juan de Fuca Ridge, dropping down to 4800 m. This basin is at a slightly different angle than the other western depressions, likely due to interference from the Juan de Fuca Ridge.All of these depressions are likely pull-apart basins, the result of extensional stresses from the two nearby spreading centers.Most large events in this zone occur on the Blanco Ridge, as the motion on this fault accounts for the majority of the plate movement.