In addition to the tectonic forces of the subducting Juan de Fuca plate, Washington is also experiencing deformation from another direction? What is the other major tectonic force acting on the Pacific Northwest? Group of answer choices The hard rocks in the Canadian Buttress are pushing southward on the Pacific Northwest The magma from Yellowstone is exerting an eastward pressure on the Pacific Northwest The Alaskan block is pushing southward onto the Pacific Northwest